485BPOS

As filed with the Securities and Exchange Commission on December 18, 2012

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. 36	x
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	x
Amendment No.  38	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 (Americas) 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
1775 I 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. 36 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 18th day of December, 2012.

PACE SELECT ADVISORS TRUST
By:	/s/ Eric Sanders
	Eric Sanders
	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	December 18, 2012
Richard Q. Armstrong*
/s/ Alan S. Bernikow	Trustee	December 18, 2012
Alan S. Bernikow*
/s/ Richard R. Burt	Trustee	December 18, 2012
Richard R. Burt*
/s/ Mark E. Carver	President	December 18, 2012
Mark E. Carver*
/s/ Thomas Disbrow	Vice President and Treasurer	December 18, 2012
Thomas Disbrow
/s/ Meyer Feldberg	Trustee	December 18, 2012
Meyer Feldberg*
/s/ Bernard H. Garil	Trustee	December 18, 2012
Bernard H. Garil*
/s/ Heather R. Higgins	Trustee	December 18, 2012
Heather R. Higgins*
/s/ Barry M. Mandinach	Trustee	December 18, 2012
Barry M. Mandinach*

*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.

PACE SELECT ADVISORS TRUST

EXHIBIT INDEX

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

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PACE Municipal Fixed Income Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.28%
Total annual fund operating expenses		0.72%
Management fee waiver/expense reimbursements	[1]	0.07%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Municipal Fixed Income Investments Class P	268	838	1,433	3,046

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 32% 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. 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

Total return January 1 - September 30, 2012: 3.93%
Best quarter during calendar years shown--3Q 2009: 6.13%
Worst quarter during calendar years shown--4Q 2010: (3.13)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Municipal Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	7.61%	3.02%	2.25%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	7.61%	3.02%	2.25%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	6.09%	3.07%	2.40%	Aug. 24, 1995
Barclays US Municipal 3-15 Year Blend Index	Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)	9.63%	5.74%	5.35%

[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 November 30, 2013 (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.

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Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments
Risk Return [Abstract]	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)
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 54% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	54.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments 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 (that is, companies with a total market capitalization of $3.0 billion or greater 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 Management Company ("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 sus-tained 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 16.07%             Best quarter during calendar years shown--3Q 2009: 15.04%         Worst quarter during calendar years shown--4Q 2008: (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 (for the periods ended December 31, 2011)
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments | Russell 1000 Growth Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	2.64%
5 Years	rr_AverageAnnualReturnYear05	2.50%
10 Years	rr_AverageAnnualReturnYear10	2.60%
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	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	299
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	915
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,557
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,280
Annual Return 2002	rr_AnnualReturn2002	(30.71%)
Annual Return 2003	rr_AnnualReturn2003	29.66%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	16.07%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	15.04%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(21.35%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(2.98%)
5 Years	rr_AverageAnnualReturnYear05	(1.12%)
10 Years	rr_AverageAnnualReturnYear10	(0.35%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(3.02%)
5 Years	rr_AverageAnnualReturnYear05	(1.24%)
10 Years	rr_AverageAnnualReturnYear10	(0.42%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(1.89%)
5 Years	rr_AverageAnnualReturnYear05	(0.94%)
10 Years	rr_AverageAnnualReturnYear10	(0.30%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

XML

PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments

PACE Government 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	PACE Government 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		PACE Government 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%)		0.33%
Total annual fund operating expenses		0.85%
Management fee waiver/expense reimbursements	[1]	0.13%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Government Securities Fixed Income Investments Class P	275	871	1,492	3,167

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 1,046% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests in US government bonds and other bonds of varying maturities,
but normally limits its portfolio "duration" to within two years (plus or minus)
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 July 31, 2012 was 2.64 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 government fixed income
securities. There are different types of 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 also invest in investment grade bonds of non-government issuers,
including those backed by mortgages or other assets. These bonds generally have
one of the two highest credit ratings, although the fund may invest to a limited
extent in bonds with the third highest credit rating (or unrated bonds of
equivalent quality).

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 may also
invest in when-issued or delayed delivery bonds to increase its return, giving
rise to a form of leverage.

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
hold or purchase TBA securities with one coupon and short sell 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.   

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.

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 Government Securities Fixed Income Investments Annual Total Returns of Class P Shares

Total return January 1 - September 30, 2012: 3.32%
Best quarter during calendar years shown--3Q 2009: 3.85%
Worst quarter during calendar years shown--2Q 2004: (1.13)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Government Securities Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	3.44%	4.31%	3.26%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	2.13%	2.33%	1.56%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	2.25%	2.54%	1.77%	Aug. 24, 1995
Barclays US Mortgage-Backed Securities Index	Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)	6.23%	6.54%	5.69%

[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 November 30, 2013 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 November 30, 2013 (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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments
Risk Return [Abstract]	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)
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 40% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	40.00%
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:	[1]
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. 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.
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. 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. 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.
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 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 5.98% Best quarter during calendar years shown--3Q 2010: 11.45% Worst quarter during calendar years shown--3Q 2008: (7.33)%
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Index reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments | Barclays Global Aggregate ex US Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays Global Aggregate ex US Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	4.36%
5 Years	rr_AverageAnnualReturnYear05	6.42%
10 Years	rr_AverageAnnualReturnYear10	8.29%
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.65%
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	1.11%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.11%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.00%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	303
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	949
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,621
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,413
Annual Return 2002	rr_AnnualReturn2002	17.42%
Annual Return 2003	rr_AnnualReturn2003	14.31%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	5.98%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2010:
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-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(7.33%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	0.80%
5 Years	rr_AverageAnnualReturnYear05	3.79%
10 Years	rr_AverageAnnualReturnYear10	4.79%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(1.72%)
5 Years	rr_AverageAnnualReturnYear05	1.73%
10 Years	rr_AverageAnnualReturnYear10	2.85%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	0.54%
5 Years	rr_AverageAnnualReturnYear05	2.04%
10 Years	rr_AverageAnnualReturnYear10	2.99%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to (1) waive its management fees through November 30, 2013 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 November 30, 2013 (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.

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Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 32% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	32.00%
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 [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:	[1]
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	assuming no sale of shares
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. 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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	Total return January 1 - September 30, 2012: 3.34% Best quarter during calendar years shown--3Q 2009: 5.93% Worst quarter during calendar years shown--4Q 2010: (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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Barclays US Municipal 3-15 Year Blend Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	9.63%
5 Years	rr_AverageAnnualReturnYear05	5.74%
10 Years	rr_AverageAnnualReturnYear10	5.35%
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.26%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.95%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.05%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.90%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	538
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	734
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	947
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,560
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	4.60%
5 Years	rr_AverageAnnualReturnYear05	3.88%
10 Years	rr_AverageAnnualReturnYear10	3.60%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 23, 2001
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.26%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.45%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.05%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.40%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	218
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	454
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	787
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,731
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	143
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	454
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	787
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	1,731
Annual Return 2002	rr_AnnualReturn2002	6.98%
Annual Return 2003	rr_AnnualReturn2003	2.68%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.34%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
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-4Q 2010:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.31%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	8.21%
5 Years	rr_AverageAnnualReturnYear05	4.32%
10 Years	rr_AverageAnnualReturnYear10	3.54%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	8.21%
5 Years	rr_AverageAnnualReturnYear05	4.32%
10 Years	rr_AverageAnnualReturnYear10	3.54%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	6.22%
5 Years	rr_AverageAnnualReturnYear05	4.08%
10 Years	rr_AverageAnnualReturnYear10	3.43%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.73%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.08%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.65%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	66
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	225
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	398
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	899
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	9.78%
5 Years	rr_AverageAnnualReturnYear05	5.10%
10 Years	rr_AverageAnnualReturnYear10	4.32%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 23, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through November 30, 2013 (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.

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PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.52%
Total annual fund operating expenses		1.22%
Management fee waiver/expense reimbursements	[1]	0.06%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.16%

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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Small/Medium Co Value Equity Investments Class P	319	986	1,678	3,518

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 72%
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 (that is, companies with a total market
capitalization of less than $6.0 billion 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 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 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.

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

Total return January 1 - September 30, 2012: 12.93%            
Best quarter during calendar years shown--2Q 2009: 27.55%        
Worst quarter during calendar years shown--4Q 2008: (27.67)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Small/Medium Co Value Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(10.02%)	(2.47%)	2.31%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(10.02%)	(2.97%)	1.38%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(6.51%)	(2.18%)	1.85%	Aug. 24, 1995
Russell 2500 Value Index	Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)	(3.36%)	(0.58%)	7.16%

[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 November 30, 2013 (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 1.16%. 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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE Government 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)
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 1,046% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	1046.00%
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:	[1]
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments The fund invests in US government bonds and other bonds of varying maturities, but normally limits its portfolio "duration" to within two years (plus or minus) 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 July 31, 2012 was 2.64 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 government fixed income securities. There are different types of 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 also invest in investment grade bonds of non-government issuers, including those backed by mortgages or other assets. These bonds generally have one of the two highest credit ratings, although the fund may invest to a limited extent in bonds with the third highest credit rating (or unrated bonds of equivalent quality). 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 may also invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage. 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 hold or purchase TBA securities with one coupon and short sell 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.    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.
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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Government 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 3.32% Best quarter during calendar years shown--3Q 2009: 3.85% Worst quarter during calendar years shown--2Q 2004: (1.13)%
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 (for the periods ended December 31, 2011)
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments | Barclays US Mortgage-Backed Securities Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	6.23%
5 Years	rr_AverageAnnualReturnYear05	6.54%
10 Years	rr_AverageAnnualReturnYear10	5.69%
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.52%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.85%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.13%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.72%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	275
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	871
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,492
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,167
Annual Return 2002	rr_AnnualReturn2002	7.02%
Annual Return 2003	rr_AnnualReturn2003	2.96%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.32%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
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-2Q 2004:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2004
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(1.13%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	3.44%
5 Years	rr_AverageAnnualReturnYear05	4.31%
10 Years	rr_AverageAnnualReturnYear10	3.26%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	2.13%
5 Years	rr_AverageAnnualReturnYear05	2.33%
10 Years	rr_AverageAnnualReturnYear10	1.56%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	2.25%
5 Years	rr_AverageAnnualReturnYear05	2.54%
10 Years	rr_AverageAnnualReturnYear10	1.77%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to (1) waive its management fees through November 30, 2013 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 November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 72% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	72.00%
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 [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 (that is, companies with a total market capitalization of less than $6.0 billion 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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	Total return January 1 - September 30, 2012: 12.11% Best quarter during calendar years shown--2Q 2009: 27.19% Worst quarter during calendar years shown--4Q 2008: (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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Russell 2500 Value Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(3.36%)
5 Years	rr_AverageAnnualReturnYear05	(0.58%)
10 Years	rr_AverageAnnualReturnYear10	7.16%
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.37%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.32%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	677
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	945
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,234
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,053
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(13.32%)
5 Years	rr_AverageAnnualReturnYear05	(1.79%)
10 Years	rr_AverageAnnualReturnYear10	3.60%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.37%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.07%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	310
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	649
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,114
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,400
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	210
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	649
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,114
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,400
Annual Return 2002	rr_AnnualReturn2002	(16.75%)
Annual Return 2003	rr_AnnualReturn2003	37.32%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	12.11%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	27.19%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(27.90%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(9.87%)
5 Years	rr_AverageAnnualReturnYear05	(1.42%)
10 Years	rr_AverageAnnualReturnYear10	3.39%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(9.87%)
5 Years	rr_AverageAnnualReturnYear05	(1.92%)
10 Years	rr_AverageAnnualReturnYear10	2.43%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(6.42%)
5 Years	rr_AverageAnnualReturnYear05	(1.31%)
10 Years	rr_AverageAnnualReturnYear10	2.76%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.46%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.16%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	118
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	368
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	638
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,409
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(8.10%)
5 Years	rr_AverageAnnualReturnYear05	(0.36%)
10 Years	rr_AverageAnnualReturnYear10	4.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 20, 2000

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 44% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	44.00%
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 [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. The derivatives in which the fund may invest include futures (on indices or currencies). These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency or other exposure. 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"), J.P. Morgan Investment Management Inc. ("J.P. Morgan") and Martin Currie Inc. ("Martin Currie") 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. J.P. Morgan manages two separate segments of the fund's assets, utilizing distinct investment strategies and portfolio management for each. In managing one segment of the fund's assets, the International Research Enhanced Index Strategy segment ("International REI" segment), J.P. Morgan uses a bottom-up, research driven strategy that seeks to generate risk characteristics and maintain regional weights and sector/industry weights that are close to those of the fund's benchmark, while also capitalizing on the firm's proprietary research capabilities in seeking to generate outperformance. The strategy is driven by valuation based fundamental analysis focused on normalized earnings and earnings growth. Stock selection is the focus, and is expected to be the primary source of added value. In managing the second segment of the fund's assets, the Europe, Australasia, and Far East Opportunities Strategy segment ("EAFE Opportunities" segment), J.P. Morgan uses an active equity strategy. J.P. Morgan applies a uniform valuation methodology across regions and sectors, and analysts conduct thorough analysis with a particular emphasis on a company's normalized (or mid-cycle) earnings and their intermediate growth rate. J.P. Morgan typically focuses on the most attractive companies, within a sector, that possess a catalyst for share price appreciation. Martin Currie has a highly active "conviction" approach, seeking the best opportunities for growth across global stock markets. Martin Currie utilizes a stock-focused portfolio construction approach driven by fundamental research to attempt to exploit market inefficiencies and generate above-market performance. Martin Currie employs a consistent analytical framework to seek undervalued stocks by assessing quality, value and growth characteristics over a three- to five-year 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 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.
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 and J.P. Morgan (with respect to the International REI segment) each assumed day-to-day management of a separate portion of the fund's assets on April 1, 2004. J.P. Morgan assumed day-to-day management of a second, separate portion (the EAFE Opportunities segment) of the fund's assets on November 8, 2010. 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International 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	Total return January 1 - September 30, 2012: 9.07% Best quarter during calendar years shown-2Q 2009: 22.47% Worst quarter during calendar years shown-3Q 2002: (22.38)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | MSCI EAFE Index (net)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	MSCI EAFE Index (net) (Index reflects no deduction for fees and expenses.)
1 Year	rr_AverageAnnualReturnYear01	(12.14%)
5 Years	rr_AverageAnnualReturnYear05	(4.72%)
10 Years	rr_AverageAnnualReturnYear10	4.67%
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.79%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.39%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.43%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	688
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	978
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,289
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,169
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(15.04%)
5 Years	rr_AverageAnnualReturnYear05	(7.22%)
10 Years	rr_AverageAnnualReturnYear10	2.90%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.79%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.48%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.27%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	330
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	709
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,215
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,605
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	230
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	709
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,215
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,605
Annual Return 2002	rr_AnnualReturn2002	(19.91%)
Annual Return 2003	rr_AnnualReturn2003	38.11%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	9.07%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	22.47%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2002:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2002
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.38%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(11.65%)
5 Years	rr_AverageAnnualReturnYear05	(6.95%)
10 Years	rr_AverageAnnualReturnYear10	2.63%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(11.91%)
5 Years	rr_AverageAnnualReturnYear05	(7.51%)
10 Years	rr_AverageAnnualReturnYear10	2.24%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(7.21%)
5 Years	rr_AverageAnnualReturnYear05	(5.67%)
10 Years	rr_AverageAnnualReturnYear10	2.46%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.79%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.39%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.18%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	120
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	375
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	649
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,432
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(9.82%)
5 Years	rr_AverageAnnualReturnYear05	(5.87%)
10 Years	rr_AverageAnnualReturnYear10	3.85%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 17, 2001

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 62% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	62.00%
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 [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 (that is, companies with a total market capitalization of $3.0 billion or greater 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. 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"), Westwood Management Corp. ("Westwood") and Pzena Investment Management, LLC ("Pzena") 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 indus-try 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. Westwood's strategy utilizes a value style of investing in which it chooses common stocks that it believes are currently undervalued in the market. Other key metrics for evaluating the risk/return profile of an investment include an improving return on equity, a declining debt/equity ratio and, in the case of common equities, positive earnings surprises without a corresponding increase in Wall Street estimates. Westwood has disciplines in place that serve as sell signals, such as a security reaching a predetermined price target or a change to a company's fundamentals that negatively impacts the original investment thesis. 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.
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.
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 neces-sarily 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 and Westwood each assumed day-to-day management of a separate 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. 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not neces-sarily 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	Total return January 1 - September 30, 2012: 12.54% Best quarter during calendar years shown-2Q 2009: 18.27% Worst quarter during calendar years shown-4Q 2008: (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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Russell 1000 Value Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	0.39%
5 Years	rr_AverageAnnualReturnYear05	(2.64%)
10 Years	rr_AverageAnnualReturnYear10	3.90%
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.28%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.18%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	664
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	904
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,163
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,903
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(7.81%)
5 Years	rr_AverageAnnualReturnYear05	(3.35%)
10 Years	rr_AverageAnnualReturnYear10	2.73%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.98%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	301
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	621
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,068
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,306
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	201
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	621
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,068
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,306
Annual Return 2002	rr_AnnualReturn2002	(17.69%)
Annual Return 2003	rr_AnnualReturn2003	25.72%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	12.54%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	18.27%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.79%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(4.24%)
5 Years	rr_AverageAnnualReturnYear05	(3.05%)
10 Years	rr_AverageAnnualReturnYear10	2.50%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(4.30%)
5 Years	rr_AverageAnnualReturnYear05	(3.55%)
10 Years	rr_AverageAnnualReturnYear10	1.99%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.68%)
5 Years	rr_AverageAnnualReturnYear05	(2.64%)
10 Years	rr_AverageAnnualReturnYear10	2.12%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.94%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	96
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	300
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	520
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,155
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(2.20%)
5 Years	rr_AverageAnnualReturnYear05	(1.95%)
10 Years	rr_AverageAnnualReturnYear10	3.65%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 19, 2001

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments
Risk Return [Abstract]	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)
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 398% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	398.00%
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:	[1]
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) (i.e., "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 +/- 30% of the duration of the Barclays US Intermediate Government/Credit Index. During the five year period ended July 31, 2012, this index's duration ranged between 3.54 and 3.89 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, 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. Interest rate futures, swaps and swaptions 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. 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.
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 July 29, 2002, which is the date on which BlackRock assumed day-to-day management of the fund's assets. Prior to that date, 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 3.66% Best quarter during calendar years shown--3Q 2009: 3.91% Worst quarter during calendar years shown--3Q 2008: (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 (for the periods ended December 31, 2011)
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments | Barclays US Intermediate Government/Credit Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	5.80%
5 Years	rr_AverageAnnualReturnYear05	5.88%
10 Years	rr_AverageAnnualReturnYear10	5.20%
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.06%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.68%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	271
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	845
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,444
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,066
Annual Return 2002	rr_AnnualReturn2002	(0.02%)
Annual Return 2003	rr_AnnualReturn2003	4.02%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.66%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
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-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.69%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	2.52%
5 Years	rr_AverageAnnualReturnYear05	2.99%
10 Years	rr_AverageAnnualReturnYear10	1.67%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	1.63%
5 Years	rr_AverageAnnualReturnYear05	1.69%
10 Years	rr_AverageAnnualReturnYear10	0.35%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	1.63%
5 Years	rr_AverageAnnualReturnYear05	1.79%
10 Years	rr_AverageAnnualReturnYear10	0.63%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments
Risk Return [Abstract]	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)
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 32% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	32.00%
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:	[1]
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. 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 3.93% Best quarter during calendar years shown--3Q 2009: 6.13% Worst quarter during calendar years shown--4Q 2010: (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 (for the periods ended December 31, 2011)
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments | Barclays US Municipal 3-15 Year Blend Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	9.63%
5 Years	rr_AverageAnnualReturnYear05	5.74%
10 Years	rr_AverageAnnualReturnYear10	5.35%
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.07%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.65%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	268
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	838
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,433
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,046
Annual Return 2002	rr_AnnualReturn2002	7.78%
Annual Return 2003	rr_AnnualReturn2003	3.42%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	3.93%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
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-4Q 2010:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2010
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.13%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	7.61%
5 Years	rr_AverageAnnualReturnYear05	3.02%
10 Years	rr_AverageAnnualReturnYear10	2.25%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	7.61%
5 Years	rr_AverageAnnualReturnYear05	3.02%
10 Years	rr_AverageAnnualReturnYear10	2.25%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	6.09%
5 Years	rr_AverageAnnualReturnYear05	3.07%
10 Years	rr_AverageAnnualReturnYear10	2.40%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

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PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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	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%)	0.88%
Total annual fund operating expenses	1.88%

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 $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE International Emerging Markets Equity Investments Class P	390	1,184	1,995	4,104

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 30%
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.
  
Management process

The fund employs a "manager of managers" structure. UBS Global Asset Management
(Americas) Inc. ("UBS Global AM"), the fund's manager and primary provider of
investment advisory services, has the ultimate authority, subject to oversight
by the fund's board, to oversee the fund's investment advisor(s) and recommend
their hiring, termination and replacement. Mondrian Investment Partners Limited
("Mondrian"), William Blair & Company, L.L.C. ("William Blair") and Lee Munder
Capital Group, LLC ("Lee Munder") currently serve as the fund's investment
advisors. The relative value of each investment advisor's share of the fund's
assets may change over time.

Mondrian conducts research on a global basis in an effort to identify securities
that have the potential for capital appreciation over a market cycle, using (1)
a value-oriented dividend discount methodology toward individual securities and
(2) market analysis that attempts to identify value across country boundaries.
This approach focuses on future anticipated dividends and their current
discounted worth, and then compares the values of different possible investments.
Currency returns can be an integral component of an investment's total return,
and Mondrian uses a purchasing power parity approach to assess the value of
individual currencies. Purchasing power parity attempts to identify the amount
of goods and services that a dollar will buy in the US and compares that to the
amount of a foreign currency required to buy the same amount of goods and services
in another country.

William Blair invests in a portfolio of mid cap and large cap equity securities
issued by companies in emerging markets worldwide, according to a quality growth
philosophy. William Blair's primary focus is on identifying such companies whose
growth characteristics (rate and durability) are underestimated by the market
and supported by quality management and strong competitive positioning. After
screening the universe of emerging country issuers for certain quality, growth
and liquidity characteristics to create a prospective list of investible
securities, William Blair undertakes detailed fundamental analysis of these
companies, focusing attention on areas where short- to intermediate-term
earnings trends and overall operating performance are improving or are strong.
Key considerations are the sustainability of a company's competitive advantage
relative to peers, its industry and market conditions, a sound financial
structure and high reinvestment rates that combine to create favorable
conditions for prospective growth. William Blair normally invests on a
relatively concentrated basis, with the number of holdings ranging between 50-80
securities. To a lesser extent, William Blair also takes into account country
selection and industry sector allocation. Normally, William Blair's investments
will be allocated among at least six different countries, and no more than 50%
of its segment of the fund may be invested in securities of issuers in any one
country at any given time. William Blair may obtain exposure to emerging markets
equity securities through limited investments in investment company securities,
such as exchange-traded funds ("ETFs").

Lee Munder uses a bottom-up quantitative approach to investing in emerging
markets equity securities. Inefficiencies in the market create opportunities,
and Lee Munder believes that a quantitative process, which relies on
sophisticated mathematical or statistical models in selecting investments, is
well-suited to capture these inefficiencies and provide an opportunity to
outperform the market. Lee Munder's stock selection model groups factors used to
select investments into three major categories: market dynamics, value and
quality. Market dynamic factors are designed to exploit short term trends as Lee
Munder believes investors under-react to certain developments in the short term;
value factors are intended to capture mean reversion (i.e., a return to the
average) as investors tend to overreact to certain developments in the longer
term; and quality factors incorporate information about the quality of earnings
that investors tend to overlook.

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 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.

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. Lee Munder assumed
day-to-day management of a separate portion of the fund's assets on October 16,
2012. Updated performance for the fund is available at
http://globalam-us.ubs.com/corpweb/performance.do.

After-tax returns are calculated using the historical highest individual federal
marginal income tax rates and do not reflect the impact of state and local
taxes. Actual after-tax returns depend on an investor's tax situation and may
differ from those shown. In addition, the after-tax returns shown are not
relevant to investors who hold fund shares through tax-deferred arrangements,
such as 401(k) plans or individual retirement accounts.

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

Total return January 1 - September 30, 2012: 11.48%            
Best quarter during calendar years shown--2Q 2009: 31.65%        
Worst quarter during calendar years shown--4Q 2008: (28.35)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Emerging Markets Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(19.57%)	(1.28%)	8.62%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(19.59%)	(2.79%)	7.51%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(12.14%)	(1.20%)	7.56%	Aug. 24, 1995
MSCI Emerging Markets Index	MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)	(18.17%)	2.70%	14.20%

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PACE International Fixed Income Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.46%
Total annual fund operating expenses		1.11%
Management fee waiver/expense reimbursements	[1]	0.11%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE International Fixed Income Investments Class P	303	949	1,621	3,413

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 40% 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.

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.

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.

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.

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.

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 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

Total return January 1 - September 30, 2012: 5.98%
Best quarter during calendar years shown--3Q 2010: 11.45%
Worst quarter during calendar years shown--3Q 2008: (7.33)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	0.80%	3.79%	4.79%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(1.72%)	1.73%	2.85%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	0.54%	2.04%	2.99%	Aug. 24, 1995
Barclays Global Aggregate ex US Index	Barclays Global Aggregate ex US Index (Index reflects no deduction for fees, expenses or taxes.)	4.36%	6.42%	8.29%

[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 November 30, 2013 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 November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 94% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	94.00%
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 [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:	[1]
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 (that is, companies with a total market capitalization of less than $6.0 billion 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. 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") and Riverbridge Partners, LLC ("Riverbridge") 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.
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 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. 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Small/Medium Co Growth 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	Total return January 1 - September 30, 2012: 14.84% Best quarter during calendar years shown--2Q 2009: 20.34% Worst quarter during calendar years shown--4Q 2008: (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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Russell 2500 Growth Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(1.57%)
5 Years	rr_AverageAnnualReturnYear05	2.89%
10 Years	rr_AverageAnnualReturnYear10	5.23%
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.35%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.30%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.30%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	675
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	939
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,224
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,032
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(7.55%)
5 Years	rr_AverageAnnualReturnYear05	1.58%
10 Years	rr_AverageAnnualReturnYear10	3.91%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.35%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.05%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	2.05%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	308
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	643
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,103
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,379
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	208
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	643
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,103
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,379
Annual Return 2002	rr_AnnualReturn2002	(20.79%)
Annual Return 2003	rr_AnnualReturn2003	36.23%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	14.84%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	20.34%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(26.48%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(3.88%)
5 Years	rr_AverageAnnualReturnYear05	1.94%
10 Years	rr_AverageAnnualReturnYear10	3.68%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(3.88%)
5 Years	rr_AverageAnnualReturnYear05	1.25%
10 Years	rr_AverageAnnualReturnYear10	3.02%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.52%)
5 Years	rr_AverageAnnualReturnYear05	1.46%
10 Years	rr_AverageAnnualReturnYear10	3.02%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.12%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.13%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	115
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	385
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	675
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,501
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(1.98%)
5 Years	rr_AverageAnnualReturnYear05	3.03%
10 Years	rr_AverageAnnualReturnYear10	4.82%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 12, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through November 30, 2013 (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.

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PACE Alternative Strategies Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	PACE Alternative Strategies 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		PACE Alternative Strategies Investments Class P
Management fees		1.30%
Distribution and/or service (12b-1) fees		none
Miscellaneous expenses (includes administration fee of 0.10%)		0.40%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short		0.15%
Other expenses		0.55%
Total annual fund operating expenses		1.85%
Management fee waiver/expense reimbursements	[1]	0.07%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.78%

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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Alternative Strategies Investments Class P	380	1,169	1,975	4,074

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 242%
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 achieve its investment objective with a low correlation to
market environments for traditional asset classes and as such attempts to
achieve a total rate of return which exceeds the rate of return on 3-month
Treasury bills by 3.00% to 4.00%, exclusive of investment management fees,
on an annualized basis over a full market cycle. The fund's manager, UBS
Global Asset Management (Americas) Inc. ("UBS Global AM"), does not represent
or guarantee that the fund will meet this return goal, and investors should
be aware that, because of the fund's complex strategies and investments, an
investment in the fund involves a significantly higher risk level than an
investment in US Treasury bills.

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, 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 or interest rate futures),
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. Interest rate futures
and 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.

Management process

The fund employs a "manager of managers" structure. 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.
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 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 unlikely. 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, and foreign currencies, 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 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.

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.

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. Municipalities continue to
experience difficulties in the current economic and political environment.

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 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 US Consumer Price Index (CPI) shows how
the fund's performance compares to a broad indicator of inflation. Life
of class performance for the indices is as of Class P's inception
month-end. 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. 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 Alternative Strategies Investments Annual Total Returns of Class P Shares (2007 was Class P's first full calendar year of operations)

Total return January 1 - September 30, 2012: 6.30%
Best quarter during calendar years shown--2Q 2009: 7.65%
Worst quarter during calendar years shown--3Q 2008: (11.93)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Alternative Strategies Investments	Label	1 Year	5 Years	Since Inception	Inception Date
Class P	Class P Return before taxes	(5.83%)	(3.77%)	(2.64%)	Apr. 10, 2006
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(5.83%)	(4.06%)	(2.91%)	Apr. 10, 2006
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(3.79%)	(3.28%)	(2.32%)	Apr. 10, 2006
Citigroup Three-Month US Treasury Bill Index	Citigroup Three-Month US Treasury Bill Index	0.08%	1.36%	1.79%
Barclays Global Aggregate Index	Barclays Global Aggregate Index	5.64%	6.46%	6.55%
US Consumer Price Index (CPI)	US Consumer Price Index (CPI) (Indices reflect no deduction for fees, expenses or taxes.)	2.96%	2.26%	2.02%

[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 November 30, 2013 (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 1.63%. 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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments
Risk Return [Abstract]	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.
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 242% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	242.00%
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:	[1]
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 achieve its investment objective with a low correlation to market environments for traditional asset classes and as such attempts to achieve a total rate of return which exceeds the rate of return on 3-month Treasury bills by 3.00% to 4.00%, exclusive of investment management fees, on an annualized basis over a full market cycle. The fund's manager, UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), does not represent or guarantee that the fund will meet this return goal, and investors should be aware that, because of the fund's complex strategies and investments, an investment in the fund involves a significantly higher risk level than an investment in US Treasury bills. 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, 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 or interest rate futures), 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. Interest rate futures and 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. Management process The fund employs a "manager of managers" structure. 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. 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 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 unlikely. 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, and foreign currencies, 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 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.
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. 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. Municipalities continue to experience difficulties in the current economic and political environment. 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 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 US Consumer Price Index (CPI) shows how the fund's performance compares to a broad indicator of inflation. Life of class performance for the indices is as of Class P's inception month-end. 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. Updated performance for the fund is available at http://globalam-us.ubs.com/corpweb/performance.do. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Alternative Strategies 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]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 6.30% Best quarter during calendar years shown--2Q 2009: 7.65% Worst quarter during calendar years shown--3Q 2008: (11.93)%
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 (for the periods ended December 31, 2011)
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Citigroup Three-Month US Treasury Bill Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Citigroup Three-Month US Treasury Bill Index
1 Year	rr_AverageAnnualReturnYear01	0.08%
5 Years	rr_AverageAnnualReturnYear05	1.36%
Since Inception	rr_AverageAnnualReturnSinceInception	1.79%
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Barclays Global Aggregate Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays Global Aggregate Index
1 Year	rr_AverageAnnualReturnYear01	5.64%
5 Years	rr_AverageAnnualReturnYear05	6.46%
Since Inception	rr_AverageAnnualReturnSinceInception	6.55%
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | US Consumer Price Index (CPI)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	US Consumer Price Index (CPI) (Indices reflect no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	2.96%
5 Years	rr_AverageAnnualReturnYear05	2.26%
Since Inception	rr_AverageAnnualReturnSinceInception	2.02%
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	1.30%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Miscellaneous expenses (includes administration fee of 0.10%)	rr_Component1OtherExpensesOverAssets	0.40%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	rr_Component2OtherExpensesOverAssets	0.15%
Other expenses	rr_OtherExpensesOverAssets	0.55%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.85%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.07%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.78%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	380
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,169
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,975
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	4,074
Annual Return 2007	rr_AnnualReturn2007	7.67%
Annual Return 2008	rr_AnnualReturn2008	(24.06%)
Annual Return 2009	rr_AnnualReturn2009	11.69%
Annual Return 2010	rr_AnnualReturn2010	3.93%
Annual Return 2011	rr_AnnualReturn2011	(3.93%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	6.30%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	7.65%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(11.93%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(5.83%)
5 Years	rr_AverageAnnualReturnYear05	(3.77%)
Since Inception	rr_AverageAnnualReturnSinceInception	(2.64%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(5.83%)
5 Years	rr_AverageAnnualReturnYear05	(4.06%)
Since Inception	rr_AverageAnnualReturnSinceInception	(2.91%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(3.79%)
5 Years	rr_AverageAnnualReturnYear05	(3.28%)
Since Inception	rr_AverageAnnualReturnSinceInception	(2.32%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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 1.63%. 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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE Strategic Fixed Income Investments
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Total return consisting of income and 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 $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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 162% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	162.00%
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 [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:	[1]
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within two years (plus or minus) of the effective duration of the fund's benchmark index, Barclays US Government/Credit Index, as calculated by the investment advisor, which as of July 31, 2012 was 6.07 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, 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), 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. Interest rate futures and swaps 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. 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.
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 invest-    ment 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.
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Strategic 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	Total return January 1 - September 30, 2012: 7.44% Best quarter during calendar years shown--3Q 2009: 8.68% Worst quarter during calendar years shown--3Q 2008: (3.56)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Barclays US Government/ Credit Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Government/ Credit Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	8.74%
5 Years	rr_AverageAnnualReturnYear05	6.55%
10 Years	rr_AverageAnnualReturnYear10	5.85%
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.50%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.04%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.04%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	551
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	766
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	998
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,664
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	4.68%
5 Years	rr_AverageAnnualReturnYear05	7.76%
10 Years	rr_AverageAnnualReturnYear10	6.41%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 11, 2000
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.50%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.27%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.52%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.52%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	230
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	480
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	829
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,813
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	155
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	480
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	829
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	1,813
Annual Return 2002	rr_AnnualReturn2002	9.21%
Annual Return 2003	rr_AnnualReturn2003	4.93%
Annual Return 2004	rr_AnnualReturn2004	4.11%
Annual Return 2005	rr_AnnualReturn2005	1.64%
Annual Return 2006	rr_AnnualReturn2006	3.11%
Annual Return 2007	rr_AnnualReturn2007	7.19%
Annual Return 2008	rr_AnnualReturn2008	0.98%
Annual Return 2009	rr_AnnualReturn2009	14.16%
Annual Return 2010	rr_AnnualReturn2010	10.13%
Annual Return 2011	rr_AnnualReturn2011	9.05%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	7.44%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	8.68%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.56%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	8.30%
5 Years	rr_AverageAnnualReturnYear05	8.22%
10 Years	rr_AverageAnnualReturnYear10	6.38%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	6.60%
5 Years	rr_AverageAnnualReturnYear05	6.04%
10 Years	rr_AverageAnnualReturnYear10	4.63%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	5.61%
5 Years	rr_AverageAnnualReturnYear05	5.80%
10 Years	rr_AverageAnnualReturnYear10	4.48%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.50%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.39%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.89%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.08%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.81%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	83
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	276
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	485
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,089
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	9.77%
5 Years	rr_AverageAnnualReturnYear05	9.06%
10 Years	rr_AverageAnnualReturnYear10	7.20%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 02, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE Strategic Fixed Income Investments
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Total return consisting of income and capital appreciation.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses of the fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction costs, such as commissions 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 162% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	162.00%
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:	[1]
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments The fund invests in bonds of varying maturities, but normally limits its portfolio "duration" to within two years (plus or minus) of the effective duration of the fund's benchmark index, Barclays US Government/Credit Index, as calculated by the investment advisor, which as of July 31, 2012 was 6.07 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, 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), 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. Interest rate futures and swaps 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 recom-mend 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.
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. 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.
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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Strategic 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 8.00% Best quarter during calendar years shown--3Q 2009: 8.81% Worst quarter during calendar years shown--3Q 2008: (3.38)%
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Index reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments | Barclays US Government/ Credit Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	8.74%
5 Years	rr_AverageAnnualReturnYear05	6.55%
10 Years	rr_AverageAnnualReturnYear10	5.85%
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.50%
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	0.82%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.01%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.81%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	284
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	873
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,488
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,147
Annual Return 2002	rr_AnnualReturn2002	10.11%
Annual Return 2003	rr_AnnualReturn2003	5.75%
Annual Return 2004	rr_AnnualReturn2004	4.93%
Annual Return 2005	rr_AnnualReturn2005	2.43%
Annual Return 2006	rr_AnnualReturn2006	3.80%
Annual Return 2007	rr_AnnualReturn2007	7.91%
Annual Return 2008	rr_AnnualReturn2008	1.73%
Annual Return 2009	rr_AnnualReturn2009	15.10%
Annual Return 2010	rr_AnnualReturn2010	11.02%
Annual Return 2011	rr_AnnualReturn2011	9.75%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	8.00%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	8.81%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.38%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	7.58%
5 Years	rr_AverageAnnualReturnYear05	6.85%
10 Years	rr_AverageAnnualReturnYear10	5.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	5.65%
5 Years	rr_AverageAnnualReturnYear05	4.44%
10 Years	rr_AverageAnnualReturnYear10	3.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	5.14%
5 Years	rr_AverageAnnualReturnYear05	4.47%
10 Years	rr_AverageAnnualReturnYear10	3.16%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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 0.81%. 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.

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PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments

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. 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Large 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses PACE Large Co Value Equity Investments	Class A	Class C	Class Y
Management fees	0.65%	0.65%	0.65%
Distribution and/or service (12b-1) fees	0.25%	1.00%	none
Other expenses (includes administration fee of 0.10%)	0.28%	0.33%	0.29%
Total annual fund operating expenses	1.18%	1.98%	0.94%

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 PACE Large Co Value Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	664	904	1,163	1,903
Class C	301	621	1,068	2,306
Class Y	96	300	520	1,155

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Large Co Value Equity Investments Class C	201	621	1,068	2,306

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 62%
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 (that is, companies with a
total market capitalization of $3.0 billion or greater 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.

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"), Westwood Management Corp. ("Westwood") and Pzena Investment Management,
LLC ("Pzena") 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 indus-try 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.

Westwood's strategy utilizes a value style of investing in which it chooses
common stocks that it believes are currently undervalued in the market. Other
key metrics for evaluating the risk/return profile of an investment include an
improving return on equity, a declining debt/equity ratio and, in the case of
common equities, positive earnings surprises without a corresponding increase in
Wall Street estimates. Westwood has disciplines in place that serve as sell
signals, such as a security reaching a predetermined price target or a change to
a company's fundamentals that negatively impacts the original investment thesis.

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.

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.

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 neces-sarily 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 and Westwood
each assumed day-to-day management of a separate 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. 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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total
returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 12.54%
Best quarter during calendar years shown-2Q 2009: 18.27%
Worst quarter during calendar years shown-4Q 2008: (22.79)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Large Co Value Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(7.81%)	(3.35%)	2.73%	Nov. 27, 2000
Class C	Class C Return before taxes	(4.24%)	(3.05%)	2.50%	Nov. 27, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(4.30%)	(3.55%)	1.99%	Nov. 27, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(2.68%)	(2.64%)	2.12%	Nov. 27, 2000
Class Y	Class Y Return before taxes	(2.20%)	(1.95%)	3.65%	Jan. 19, 2001
Russell 1000 Value Index	Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)	0.39%	(2.64%)	3.90%

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PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments

PACE High Yield 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	PACE High Yield 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		PACE High Yield Investments Class P
Management fees		0.70%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.45%
Total annual fund operating expenses		1.15%
Management fee waiver/expense reimbursements	[1]	0.12%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.03%

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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE High Yield Investments Class P	306	960	1,639	3,449

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 20% of the average value of its portfolio.

Principal strategies

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 referred to 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.

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), currency forward agreements, swap
agreements (specifically, 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. 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. MacKay Shields
anticipates that under normal circumstances the fund's average duration will be
within +/- 25% of that of the BofA Merrill Lynch Global High Yield Index. This index
ordinarily has a duration of between 4 and 5 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.

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:

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 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.

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.

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://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.

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

Total return January 1 - September 30, 2012: 13.43%            
Best quarter during calendar years shown--2Q 2009: 20.77%        
Worst quarter during calendar years shown--4Q 2008: (12.52)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE High Yield Investments	Label	1 Year	5 Years	Since Inception	Inception Date
Class P	Class P Return before taxes	(1.99%)	5.38%	5.52%	Apr. 10, 2006
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(4.62%)	2.50%	2.73%	Apr. 10, 2006
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(0.98%)	2.90%	3.06%	Apr. 10, 2006
BofA Merrill Lynch Global High Yield Index (hedged in USD)	BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)	3.18%	7.28%	7.92%

[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 November 30, 2013 (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.

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

XML

PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments

PACE High Yield 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 $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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE High Yield Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses PACE High Yield Investments		Class A	Class C	Class Y
Management fees		0.70%	0.70%	0.70%
Distribution and/or service (12b-1) fees		0.25%	0.75%	none
Other expenses (includes administration fee of 0.10%)		0.37%	0.32%	0.33%
Total annual fund operating expenses		1.32%	1.77%	1.03%
Management fee waiver/expenses reimbursements	[1]	0.04%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.28%	1.77%	1.03%

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:

^[1]

Expense Example PACE High Yield Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	575	846	1,137	1,965
Class C	255	557	959	2,084
Class Y	105	328	569	1,259

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE High Yield Investments Class C	180	557	959	2,084

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 20% of the average value of its portfolio.

Principal strategies

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 referred to 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.

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), currency forward agreements, swap
agreements (specifically, 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. 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. MacKay
Shields anticipates that under normal circumstances the fund's average duration
will be within +/- 25% of that of the BofA Merrill Lynch Global High Yield
Index. This index ordinarily has a duration of between 4 and 5 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.

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:

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 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 credit, total return, equity,
interest rate, index, currency and variance 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.

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 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.

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

Total return January 1 - September 30, 2012: 13.28%
Best quarter during calendar years shown--2Q 2009: 20.87%
Worst quarter during calendar years shown--4Q 2008: (12.47)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE High Yield Investments	Label	1 Year	5 Years	Since Inception		Inception Date
Class A	Class A Return before taxes	(4.67%)	6.26%	6.53%		May 01, 2006
Class A After Taxes on Distributions	Class A Return after taxes on distributions	(7.17%)	3.44%	3.78%		May 01, 2006
Class A After Taxes on Distributions and Sales	Class A Return after taxes on distributions and sale of fund shares	(2.75%)	3.67%	3.94%		May 01, 2006
Class C	Class C Return before taxes	(1.25%)		17.99%		Jan. 21, 2009
Class Y	Class Y Return before taxes	0.08%		22.07%		Dec. 26, 2008
BofA Merrill Lynch Global High Yield Index (hedged in USD)	BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)	3.18%	7.28%		[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 November 30, 2013 (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 1.28% for Class A, 1.78% for Class C and 1.03% 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] 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-7.85%; Class C-22.60%; Class Y-25.57%.

[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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE International Emerging Markets Equity Investments
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Capital appreciation.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses of the fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund. 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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 30% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	30.00%
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 [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 that are tied economically to emerging market countries, which may include equity securities issued by companies domiciled in emerging market countries. The fund generally defines emerging market countries as countries that are not included in the MSCI World Index of major world economies. However, countries included in this index may be considered emerging markets based on current political and economic factors. The fund may not always diversify its investments on a geographic basis among emerging market countries. The fund may from time to time invest a significant portion of its assets in the stocks of companies in various economic sectors, such as financials or technology. The fund may invest, to a limited extent, in (1) bonds, including up to 10% of its total assets in bonds that are below investment grade, which are commonly known as "junk bonds," and (2) securities of other investment companies that invest in emerging markets. Management process The fund employs a "manager of managers" structure. UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager and primary provider of investment advisory services, has the ultimate authority, subject to oversight by the fund's board, to oversee the fund's investment advisor(s) and recommend their hiring, termination and replacement. Mondrian Investment Partners Limited ("Mondrian"), William Blair & Company, L.L.C. ("William Blair") and Lee Munder Capital Group, LLC ("Lee Munder") currently serve as the fund's investment advisors. The relative value of each investment advisor's share of the fund's assets may change over time. Mondrian conducts research on a global basis in an effort to identify securities that have the potential for capital appreciation over a market cycle, using (1) a value-oriented dividend discount methodology toward individual securities and (2) market analysis that attempts to identify value across country boundaries. This approach focuses on future anticipated dividends and their current discounted worth, and then compares the values of different possible investments. Currency returns can be an integral component of an investment's total return, and Mondrian uses a purchasing power parity approach to assess the value of individual currencies. Purchasing power parity attempts to identify the amount of goods and services that a dollar will buy in the US and compares that to the amount of a foreign currency required to buy the same amount of goods and services in another country. William Blair invests in a portfolio of mid cap and large cap equity securities issued by companies in emerging markets worldwide, according to a quality growth philosophy. William Blair's primary focus is on identifying such companies whose growth characteristics (rate and durability) are underestimated by the market and supported by quality management and strong competitive positioning. After screening the universe of emerging country issuers for certain quality, growth and liquidity characteristics to create a prospective list of investible securities, William Blair undertakes detailed fundamental analysis of these companies, focusing attention on areas where short- to intermediate-term earnings trends and overall operating performance are improving or are strong. Key considerations are the sustainability of a company's competitive advantage relative to peers, its industry and market conditions, a sound financial structure and high reinvestment rates that combine to create favorable conditions for prospective growth. William Blair normally invests on a relatively concentrated basis, with the number of holdings ranging between 50-80 securities. To a lesser extent, William Blair also takes into account country selection and industry sector allocation. Normally, William Blair's investments will be allocated among at least six different countries, and no more than 50% of its segment of the fund may be invested in securities of issuers in any one country at any given time. William Blair may obtain exposure to emerging markets equity securities through limited investments in investment company securities, such as exchange-traded funds ("ETFs"). Lee Munder uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and Lee Munder believes that a quantitative process, which relies on sophisticated mathematical or statistical models in selecting investments, is well-suited to capture these inefficiencies and provide an opportunity to outperform the market. Lee Munder's stock selection model groups factors used to select investments into three major categories: market dynamics, value and quality. Market dynamic factors are designed to exploit short term trends as Lee Munder believes investors under-react to certain developments in the short term; value factors are intended to capture mean reversion (i.e., a return to the average) as investors tend to overreact to certain developments in the longer term; and quality factors incorporate information about the quality of earnings that investors tend to overlook.
Risk [Heading]	rr_RiskHeading	Principal risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	All investments carry a certain amount of risk and the fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the fund. An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The principal risks presented by an investment in the fund are: Equity risk: Stocks and other equity securities, and securities convertible into stocks, generally fluctuate in value more than bonds. The fund could lose all of its investment in a company's stock. Sector risk: Because the fund may invest a significant portion of its assets in the stocks of companies in particular economic sectors, economic changes adversely affecting such a sector may have more of an impact on the fund's performance than another fund having a broader range of investments. Foreign investing risk: The value of the fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad and due to decreases in foreign currency values relative to the US dollar. Investments in foreign government bonds involve special risks because the fund may have limited legal recourse in the event of default. Also, foreign securities are sometimes less liquid and more difficult to sell and to value than securities of US issuers. These risks are greater for investments in emerging market issuers. In addition, investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers. Foreign currency risk: The value of non-US dollar denominated securities held by the fund may be affected by changes in exchange rates or control regulations. If a local currency gains against the US dollar, the value of the holding increases in US dollar terms. In addition, the fund may be exposed to losses if its other foreign currency positions (e.g., options, forward commitments) move against it. Geographic concentration risk: To the extent the fund invests a significant portion of its assets in one geographic area, it will be more susceptible to factors adversely affecting that area. Credit risk: The risk that the fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality. Interest rate risk: An increase in prevailing interest rates typically causes the value of fixed income securities to fall. Changes in interest rates will likely affect the value of longer-duration fixed income securities more than shorter-duration securities and higher quality securities more than lower quality securities. When interest rates are falling, some fixed income securities provide that the issuer may repay them earlier than the maturity date, and if this occurs the fund may have to reinvest these repayments at lower interest rates. Market risk: The risk that the market value of the fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole. Moreover, changing market, economic and political conditions in one country or geographic region could adversely impact market, economic and political conditions in other countries or regions. Investment company risk: Investments in open- or closed-end investment companies involve certain risks. The shares of other investment companies are subject to the management fees and other expenses of those companies, and the purchase of shares of some investment companies requires the payment of sales loads and (in the case of closed-end investment companies) sometimes substantial premiums above the value of such companies' portfolio securities. Foreign custody risk: The fund may hold foreign securities and cash with foreign banks, agents and securities depositories. Such foreign banks or securities depositories may be subject to limited regulatory oversight. The laws of certain countries also may limit the fund's ability to recover its assets if a foreign bank or depository enters into bankruptcy. Portfolio turnover risk: The fund may engage in frequent trading, which can result in high portfolio turnover. A high portfolio turnover rate involves greater expenses to the fund, including transaction costs, and is likely to generate more taxable short-term gains for shareholders, which may have an adverse impact on performance. 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. 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.
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 September 28, 2004. William Blair assumed day-to-day management of a separate portion of the fund's assets on March 23, 2011. Lee Munder assumed day-to-day management of a separate portion of the fund's assets on October 16, 2012. Updated performance for the fund is available at http://globalam-us.ubs.com/corpweb/performance.do. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International Emerging Markets Equity Investments Annual Total Returns of Class 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	Total return January 1 - September 30, 2012: 10.89% Best quarter during calendar years shown-2Q 2009: 31.37% Worst quarter during calendar years shown-4Q 2008: (28.45)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | MSCI Emerging Markets Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(18.17%)
5 Years	rr_AverageAnnualReturnYear05	2.70%
10 Years	rr_AverageAnnualReturnYear10	14.20%
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	1.00%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.65%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.90%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	732
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,114
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,520
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,650
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(22.51%)
5 Years	rr_AverageAnnualReturnYear05	(0.45%)
10 Years	rr_AverageAnnualReturnYear10	10.11%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 11, 2000
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	1.00%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.65%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.65%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	368
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	823
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,405
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,983
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	268
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	823
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,405
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,983
Annual Return 2002	rr_AnnualReturn2002	(14.78%)
Annual Return 2003	rr_AnnualReturn2003	53.43%
Annual Return 2004	rr_AnnualReturn2004	18.51%
Annual Return 2005	rr_AnnualReturn2005	27.91%
Annual Return 2006	rr_AnnualReturn2006	29.61%
Annual Return 2007	rr_AnnualReturn2007	34.25%
Annual Return 2008	rr_AnnualReturn2008	(52.19%)
Annual Return 2009	rr_AnnualReturn2009	62.85%
Annual Return 2010	rr_AnnualReturn2010	17.13%
Annual Return 2011	rr_AnnualReturn2011	(18.56%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	10.89%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	31.37%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(28.45%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(19.36%)
5 Years	rr_AverageAnnualReturnYear05	(0.06%)
10 Years	rr_AverageAnnualReturnYear10	9.86%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(19.24%)
5 Years	rr_AverageAnnualReturnYear05	(1.49%)
10 Years	rr_AverageAnnualReturnYear10	8.82%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(12.12%)
5 Years	rr_AverageAnnualReturnYear05	(0.16%)
10 Years	rr_AverageAnnualReturnYear10	8.71%
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
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	0.67%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.67%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	170
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	526
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	907
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,976
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(17.82%)
5 Years	rr_AverageAnnualReturnYear05	1.01%
10 Years	rr_AverageAnnualReturnYear10	11.10%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 09, 2001

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE Government 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. 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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 1,046% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	1046.00%
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 [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:	[1]
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments The fund invests in US government bonds and other bonds of varying maturities, but normally limits its portfolio "duration" to within two years (plus or minus) 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 July 31, 2012 was 2.64 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 government fixed income securities. There are different types of 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 also invest in investment grade bonds of non-government issuers, including those backed by mortgages or other assets. These bonds generally have one of the two highest credit ratings, although the fund may invest to a limited extent in bonds with the third highest credit rating (or unrated bonds of equivalent quality). 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 may also invest in when-issued or delayed delivery bonds to increase its return, giving rise to a form of leverage. 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 hold or purchase TBA securities with one coupon and short sell 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. 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.
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Government Securities 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	Total return January 1 - September 30, 2012: 2.74% Best quarter during calendar years shown--3Q 2009: 3.57% Worst quarter during calendar years shown--2Q 2004: (1.32)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Barclays US Mortgage-Backed Securities Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	6.23%
5 Years	rr_AverageAnnualReturnYear05	6.54%
10 Years	rr_AverageAnnualReturnYear10	5.69%
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.52%
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	1.05%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.08%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.97%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	545
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	761
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	996
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,668
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	0.43%
5 Years	rr_AverageAnnualReturnYear05	5.18%
10 Years	rr_AverageAnnualReturnYear10	4.61%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 31, 2001
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
Management fees	rr_ManagementFeesOverAssets	0.52%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.75%
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.56%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.09%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.47%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	225
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	484
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	841
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,849
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	150
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	484
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	841
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	1,849
Annual Return 2002	rr_AnnualReturn2002	6.21%
Annual Return 2003	rr_AnnualReturn2003	2.26%
Annual Return 2004	rr_AnnualReturn2004	3.65%
Annual Return 2005	rr_AnnualReturn2005	1.35%
Annual Return 2006	rr_AnnualReturn2006	4.14%
Annual Return 2007	rr_AnnualReturn2007	5.19%
Annual Return 2008	rr_AnnualReturn2008	2.66%
Annual Return 2009	rr_AnnualReturn2009	9.29%
Annual Return 2010	rr_AnnualReturn2010	6.42%
Annual Return 2011	rr_AnnualReturn2011	4.73%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	2.74%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	3.57%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-2Q 2004:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Jun. 30, 2004
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(1.32%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	3.98%
5 Years	rr_AverageAnnualReturnYear05	5.64%
10 Years	rr_AverageAnnualReturnYear10	4.57%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	2.94%
5 Years	rr_AverageAnnualReturnYear05	3.91%
10 Years	rr_AverageAnnualReturnYear10	3.11%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	2.61%
5 Years	rr_AverageAnnualReturnYear05	3.82%
10 Years	rr_AverageAnnualReturnYear10	3.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 04, 2000
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	none
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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.14%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.72%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	74
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	260
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	463
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,048
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	5.53%
5 Years	rr_AverageAnnualReturnYear05	6.45%
10 Years	rr_AverageAnnualReturnYear10	5.40%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 02, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to (1) waive its management fees through November 30, 2013 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 November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments
Risk Return [Abstract]	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.
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 72% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	72.00%
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:	[1]
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 (that is, companies with a total market capitalization of less than $6.0 billion 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 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 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.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Small/Medium 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 12.93%             Best quarter during calendar years shown--2Q 2009: 27.55%         Worst quarter during calendar years shown--4Q 2008: (27.67)%
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Index reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Russell 2500 Value Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(3.36%)
5 Years	rr_AverageAnnualReturnYear05	(0.58%)
10 Years	rr_AverageAnnualReturnYear10	7.16%
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.52%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.22%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.06%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.16%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	319
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	986
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,678
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,518
Annual Return 2002	rr_AnnualReturn2002	(15.82%)
Annual Return 2003	rr_AnnualReturn2003	38.65%
Annual Return 2004	rr_AnnualReturn2004	17.93%
Annual Return 2005	rr_AnnualReturn2005	3.10%
Annual Return 2006	rr_AnnualReturn2006	10.87%
Annual Return 2007	rr_AnnualReturn2007	(2.28%)
Annual Return 2008	rr_AnnualReturn2008	(35.25%)
Annual Return 2009	rr_AnnualReturn2009	36.18%
Annual Return 2010	rr_AnnualReturn2010	23.30%
Annual Return 2011	rr_AnnualReturn2011	(8.20%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	12.93%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	27.55%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(27.67%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(10.02%)
5 Years	rr_AverageAnnualReturnYear05	(2.47%)
10 Years	rr_AverageAnnualReturnYear10	2.31%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(10.02%)
5 Years	rr_AverageAnnualReturnYear05	(2.97%)
10 Years	rr_AverageAnnualReturnYear10	1.38%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(6.51%)
5 Years	rr_AverageAnnualReturnYear05	(2.18%)
10 Years	rr_AverageAnnualReturnYear10	1.85%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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 1.16%. 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.

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PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	PACE Intermediate 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		PACE Intermediate Fixed Income Investments Class P
Management fees		0.43%
Distribution and/or service (12b-1) fees		none
Other expenses (includes administration fee of 0.10%)		0.31%
Total annual fund operating expenses		0.74%
Management fee waiver/expense reimbursements	[1]	0.06%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	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. The example also assumes that your
investment has a 5% return each year and that the fund's operating expenses
remain the same.

Although your actual costs may be higher or lower, based on these assumptions
your costs would be:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Intermediate Fixed Income Investments Class P	271	845	1,444	3,066

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 398% 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) (i.e., "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 +/- 30% of the
duration of the Barclays US Intermediate Government/Credit Index. During the
five year period ended July 31, 2012, this index's duration ranged between 3.54
and 3.89 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, 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. Interest rate futures, swaps and swaptions
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. 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.

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 July 29, 2002, which is the date on which
BlackRock assumed day-to-day management of the fund's assets. Prior to
that date, 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 Intermediate Fixed Income Investments Annual Total Returns of Class P Shares

Total return January 1 - September 30, 2012: 3.66%
Best quarter during calendar years shown--3Q 2009: 3.91%
Worst quarter during calendar years shown--3Q 2008: (3.69)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Intermediate Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	2.52%	2.99%	1.67%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	1.63%	1.69%	0.35%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	1.63%	1.79%	0.63%	Aug. 24, 1995
Barclays US Intermediate Government/Credit Index	Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)	5.80%	5.88%	5.20%

[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 November 30, 2013 (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.

[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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	PACE International Emerging Markets Equity Investments
Objective [Heading]	rr_ObjectiveHeading	Investment objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Capital appreciation.
Expense [Heading]	rr_ExpenseHeading	Fees and expenses of the fund
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	These tables describe the fees and expenses that you may pay if you buy and hold shares of the fund.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 30% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	30.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in equity securities that are tied economically to emerging market countries, which may include equity securities issued by companies domiciled in emerging market countries. The fund generally defines emerging market countries as countries that are not included in the MSCI World Index of major world economies. However, countries included in this index may be considered emerging markets based on current political and economic factors. The fund may not always diversify its investments on a geographic basis among emerging market countries. The fund may from time to time invest a significant portion of its assets in the stocks of companies in various economic sectors, such as financials or technology. The fund may invest, to a limited extent, in (1) bonds, including up to 10% of its total assets in bonds that are below investment grade, which are commonly known as "junk bonds," and (2) securities of other investment companies that invest in emerging markets.    Management process The fund employs a "manager of managers" structure. UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), the fund's manager and primary provider of investment advisory services, has the ultimate authority, subject to oversight by the fund's board, to oversee the fund's investment advisor(s) and recommend their hiring, termination and replacement. Mondrian Investment Partners Limited ("Mondrian"), William Blair & Company, L.L.C. ("William Blair") and Lee Munder Capital Group, LLC ("Lee Munder") currently serve as the fund's investment advisors. The relative value of each investment advisor's share of the fund's assets may change over time. Mondrian conducts research on a global basis in an effort to identify securities that have the potential for capital appreciation over a market cycle, using (1) a value-oriented dividend discount methodology toward individual securities and (2) market analysis that attempts to identify value across country boundaries. This approach focuses on future anticipated dividends and their current discounted worth, and then compares the values of different possible investments. Currency returns can be an integral component of an investment's total return, and Mondrian uses a purchasing power parity approach to assess the value of individual currencies. Purchasing power parity attempts to identify the amount of goods and services that a dollar will buy in the US and compares that to the amount of a foreign currency required to buy the same amount of goods and services in another country. William Blair invests in a portfolio of mid cap and large cap equity securities issued by companies in emerging markets worldwide, according to a quality growth philosophy. William Blair's primary focus is on identifying such companies whose growth characteristics (rate and durability) are underestimated by the market and supported by quality management and strong competitive positioning. After screening the universe of emerging country issuers for certain quality, growth and liquidity characteristics to create a prospective list of investible securities, William Blair undertakes detailed fundamental analysis of these companies, focusing attention on areas where short- to intermediate-term earnings trends and overall operating performance are improving or are strong. Key considerations are the sustainability of a company's competitive advantage relative to peers, its industry and market conditions, a sound financial structure and high reinvestment rates that combine to create favorable conditions for prospective growth. William Blair normally invests on a relatively concentrated basis, with the number of holdings ranging between 50-80 securities. To a lesser extent, William Blair also takes into account country selection and industry sector allocation. Normally, William Blair's investments will be allocated among at least six different countries, and no more than 50% of its segment of the fund may be invested in securities of issuers in any one country at any given time. William Blair may obtain exposure to emerging markets equity securities through limited investments in investment company securities, such as exchange-traded funds ("ETFs"). Lee Munder uses a bottom-up quantitative approach to investing in emerging markets equity securities. Inefficiencies in the market create opportunities, and Lee Munder believes that a quantitative process, which relies on sophisticated mathematical or statistical models in selecting investments, is well-suited to capture these inefficiencies and provide an opportunity to outperform the market. Lee Munder's stock selection model groups factors used to select investments into three major categories: market dynamics, value and quality. Market dynamic factors are designed to exploit short term trends as Lee Munder believes investors under-react to certain developments in the short term; value factors are intended to capture mean reversion (i.e., a return to the average) as investors tend to overreact to certain developments in the longer term; and quality factors incorporate information about the quality of earnings that investors tend to overlook.
Risk [Heading]	rr_RiskHeading	Principal risks
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	All investments carry a certain amount of risk and the fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the fund. An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The principal risks presented by an investment in the fund are: Equity risk: Stocks and other equity securities, and securities convertible into stocks, generally fluctuate in value more than bonds. The fund could lose all of its investment in a company's stock. Sector risk: Because the fund may invest a significant portion of its assets in the stocks of companies in particular economic sectors, economic changes adversely affecting such a sector may have more of an impact on the fund's performance than another fund having a broader range of investments. Foreign investing risk: The value of the fund's investments in foreign securities may fall due to adverse political, social and economic developments abroad and due to decreases in foreign currency values relative to the US dollar. Investments in foreign government bonds involve special risks because the fund may have limited legal recourse in the event of default. Also, foreign securities are sometimes less liquid and more difficult to sell and to value than securities of US issuers. These risks are greater for investments in emerging market issuers. In addition, investments in emerging market issuers may decline in value because of unfavorable foreign government actions, greater risks of political instability or the absence of accurate information about emerging market issuers. Foreign currency risk: The value of non-US dollar denominated securities held by the fund may be affected by changes in exchange rates or control regulations. If a local currency gains against the US dollar, the value of the holding increases in US dollar terms. In addition, the fund may be exposed to losses if its other foreign currency positions (e.g., options, forward commitments) move against it. Geographic concentration risk: To the extent the fund invests a significant portion of its assets in one geographic area, it will be more susceptible to factors adversely affecting that area. Credit risk: The risk that the fund could lose money if the issuer or guarantor of a fixed income security, or the counterparty to or guarantor of a derivative contract, is unable or unwilling to meet its financial obligations. This risk is likely greater for lower quality investments than for investments that are higher quality. Interest rate risk: An increase in prevailing interest rates typically causes the value of fixed income securities to fall. Changes in interest rates will likely affect the value of longer-duration fixed income securities more than shorter-duration securities and higher quality securities more than lower quality securities. When interest rates are falling, some fixed income securities provide that the issuer may repay them earlier than the maturity date, and if this occurs the fund may have to reinvest these repayments at lower interest rates. Market risk: The risk that the market value of the fund's investments may fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets fluctuate. Market risk may affect a single issuer, industry, or sector of the economy, or it may affect the market as a whole. Moreover, changing market, economic and political conditions in one country or geographic region could adversely impact market, economic and political conditions in other countries or regions. Investment company risk: Investments in open- or closed-end investment companies involve certain risks. The shares of other investment companies are subject to the management fees and other expenses of those companies, and the purchase of shares of some investment companies requires the payment of sales loads and (in the case of closed-end investment companies)sometimes substantial premiums above the value of such companies' portfolio securities. Foreign custody risk: The fund may hold foreign securities and cash with foreign banks, agents and securities depositories. Such foreign banks or securities depositories may be subject to limited regulatory oversight. The laws of certain countries also may limit the fund's ability to recover its assets if a foreign bank or depository enters into bankruptcy. Portfolio turnover risk: The fund may engage in frequent trading, which can result in high portfolio turnover. A high portfolio turnover rate involves greater expenses to the fund, including transaction costs, and is likely to generate more taxable short-term gains for shareholders, which may have an adverse impact on performance. Limited capitalization risk: The risk that securities of smaller capitalization companies tend to be more volatile and less liquid than securities of larger capitalization companies. This can have a disproportionate effect on the market price of smaller capitalization companies and affect the fund's ability to purchase or sell these securities. In general, smaller capitalization companies are more vulnerable than larger companies to adverse business or economic developments and they may have more limited resources. Management risk: The risk that the investment strategies, techniques and risk analyses employed by an investment advisor may not produce the desired results. An investment advisor for the fund employs a complex strategy using proprietary quantitative models in selecting investments for the fund. Investments selected using these models may perform differently than expected as a result of the factors used in the models, the weight placed on each factor, changes from the factors' historical trends, and technical issues in the construction and implementation of the models (including, for example, data problems, software issues, or other types of errors). There is no guarantee that the investment advisor's quantitative models will perform as expected or result in effective investment decisions for the fund.
Risk Lose Money [Text]	rr_RiskLoseMoney	You may lose money by investing in the fund.
Risk Not Insured Depository Institution [Text]	rr_RiskNotInsuredDepositoryInstitution	An investment in the fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	Risk/return bar chart and table The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table. The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower. The information provides some indication of the risks of investing in the fund by showing changes in the fund's performance from year to year and by showing how the fund's average annual total returns compare with those of a broad measure of market performance. The fund's past performance(before and after taxes) is not necessarily an indication of how the fund will perform in the future. This may be particularly true given that other investment advisors were responsible for managing portions of the fund's assets during previous periods. Mondrian assumed day-to-day management of a portion of the fund's assets on September 28, 2004. William Blair assumed day-to-day management of a separate portion of the fund's assets on March 23, 2011. Lee Munder assumed day-to-day management of a separate portion of the fund's assets on October 16, 2012. Updated performance for the fund is available at http://globalam-us.ubs.com/corpweb/performance.do. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International Emerging Markets Equity Investments Annual Total Returns of Class P Shares
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 11.48%             Best quarter during calendar years shown--2Q 2009: 31.65%         Worst quarter during calendar years shown--4Q 2008: (28.35)%
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Index reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | MSCI Emerging Markets Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(18.17%)
5 Years	rr_AverageAnnualReturnYear05	2.70%
10 Years	rr_AverageAnnualReturnYear10	14.20%
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	1.00%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.88%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.88%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	390
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,184
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,995
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	4,104
Annual Return 2002	rr_AnnualReturn2002	(13.70%)
Annual Return 2003	rr_AnnualReturn2003	54.99%
Annual Return 2004	rr_AnnualReturn2004	19.53%
Annual Return 2005	rr_AnnualReturn2005	28.91%
Annual Return 2006	rr_AnnualReturn2006	30.72%
Annual Return 2007	rr_AnnualReturn2007	35.35%
Annual Return 2008	rr_AnnualReturn2008	(51.83%)
Annual Return 2009	rr_AnnualReturn2009	64.12%
Annual Return 2010	rr_AnnualReturn2010	18.03%
Annual Return 2011	rr_AnnualReturn2011	(17.94%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	11.48%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	31.65%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(28.35%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(19.57%)
5 Years	rr_AverageAnnualReturnYear05	(1.28%)
10 Years	rr_AverageAnnualReturnYear10	8.62%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(19.59%)
5 Years	rr_AverageAnnualReturnYear05	(2.79%)
10 Years	rr_AverageAnnualReturnYear10	7.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(12.14%)
5 Years	rr_AverageAnnualReturnYear05	(1.20%)
10 Years	rr_AverageAnnualReturnYear10	7.56%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments
Risk Return [Abstract]	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)
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 66% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	66.00%
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:	[1]
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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam- us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 20.43%             Best quarter during calendar years shown--2Q 2009: 25.93%         Worst quarter during calendar years shown--4Q 2008: (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 (for the periods ended December 31, 2011)
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | FTSE EPRA/NAREIT Developed Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(5.82%)
Since Inception	rr_AverageAnnualReturnSinceInception	(5.91%)
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.95%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.65%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.45%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.20%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	323
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,076
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,850
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,877
Annual Return 2008	rr_AnnualReturn2008	(49.44%)
Annual Return 2009	rr_AnnualReturn2009	27.88%
Annual Return 2010	rr_AnnualReturn2010	16.27%
Annual Return 2011	rr_AnnualReturn2011	(6.17%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	20.43%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	25.93%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(33.20%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(8.03%)
Since Inception	rr_AverageAnnualReturnSinceInception	(10.41%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(8.94%)
Since Inception	rr_AverageAnnualReturnSinceInception	(11.93%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(5.23%)
Since Inception	rr_AverageAnnualReturnSinceInception	(9.30%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 22, 2007

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

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PACE Global Real Estate Securities Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.95%
Total annual fund operating expenses		1.65%
Management fee waiver/expense reimbursements	[1]	0.45%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Global Real Estate Securities Investments Class P	323	1,076	1,850	3,877

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 66%
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)

Total return January 1 - September 30, 2012: 20.43%            
Best quarter during calendar years shown--2Q 2009: 25.93%        
Worst quarter during calendar years shown--4Q 2008: (33.20)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Global Real Estate Securities Investments	Label	1 Year	Since Inception	Inception Date
Class P	Class P Return before taxes	(8.03%)	(10.41%)	Jan. 22, 2007
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(8.94%)	(11.93%)	Jan. 22, 2007
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(5.23%)	(9.30%)	Jan. 22, 2007
FTSE EPRA/NAREIT Developed Index	FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)	(5.82%)	(5.91%)

[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 November 30, 2013 (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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments
Risk Return [Abstract]	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)
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 94% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	94.00%
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:	[1]
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 (that is, companies with a total market capitalization of less than $6.0 billion 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. 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") and Riverbridge Partners, LLC ("Riverbridge") 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.
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. 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 arrange- ments, such as 401(k) plans or individual retirement accounts.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 15.59%             Best quarter during calendar years shown--2Q 2009: 20.64%         Worst quarter during calendar years shown--4Q 2008: (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 arrange-ments, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Russell 2500 Growth Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(1.57%)
5 Years	rr_AverageAnnualReturnYear05	2.89%
10 Years	rr_AverageAnnualReturnYear10	5.23%
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.48%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.18%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.05%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.13%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	316
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	976
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,660
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,481
Annual Return 2002	rr_AnnualReturn2002	(19.88%)
Annual Return 2003	rr_AnnualReturn2003	37.68%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	15.59%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	20.64%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(26.31%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(3.94%)
5 Years	rr_AverageAnnualReturnYear05	0.90%
10 Years	rr_AverageAnnualReturnYear10	2.66%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(3.94%)
5 Years	rr_AverageAnnualReturnYear05	0.27%
10 Years	rr_AverageAnnualReturnYear10	2.04%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.56%)
5 Years	rr_AverageAnnualReturnYear05	0.61%
10 Years	rr_AverageAnnualReturnYear10	2.16%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments
Risk Return [Abstract]	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)
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 20% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	20.00%
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:	[1]
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 referred to 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. 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), currency forward agreements, swap agreements (specifically, 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. 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. MacKay Shields anticipates that under normal circumstances the fund's average duration will be within +/- 25% of that of the BofA Merrill Lynch Global High Yield Index. This index ordinarily has a duration of between 4 and 5 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.
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 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. 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 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]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalamus.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 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]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 13.43%             Best quarter during calendar years shown--2Q 2009: 20.77%         Worst quarter during calendar years shown--4Q 2008: (12.52)%
Index No Deduction for Fees, Expenses, Taxes [Text]	rr_IndexNoDeductionForFeesExpensesTaxes	Index reflects no deduction for fees, expenses or taxes.
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments | BofA Merrill Lynch Global High Yield Index (hedged in USD)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	3.18%
5 Years	rr_AverageAnnualReturnYear05	7.28%
Since Inception	rr_AverageAnnualReturnSinceInception	7.92%
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.70%
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	1.15%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.12%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.03%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	306
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	960
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,639
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,449
Annual Return 2007	rr_AnnualReturn2007	1.36%
Annual Return 2008	rr_AnnualReturn2008	(18.53%)
Annual Return 2009	rr_AnnualReturn2009	50.86%
Annual Return 2010	rr_AnnualReturn2010	15.28%
Annual Return 2011	rr_AnnualReturn2011	0.00%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	13.43%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	20.77%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(12.52%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(1.99%)
5 Years	rr_AverageAnnualReturnYear05	5.38%
Since Inception	rr_AverageAnnualReturnSinceInception	5.52%
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(4.62%)
5 Years	rr_AverageAnnualReturnYear05	2.50%
Since Inception	rr_AverageAnnualReturnSinceInception	2.73%
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(0.98%)
5 Years	rr_AverageAnnualReturnYear05	2.90%
Since Inception	rr_AverageAnnualReturnSinceInception	3.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

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PACE Money Market Investments (Prospectus Summary) | 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	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		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%)		0.64%
Total annual fund operating expenses		0.89%
Management fee waiver/expense reimbursements	[1]	0.29%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Money Market Investments Class P	263	868	1,498	3,193

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

Total return January 1 - September 30, 2012:0.01%
Best quarter during calendar years shown--4Q  2006: 1.20%
Worst quarter during calendar years shown--3Q 2009,
1Q, 2Q & 3Q 2010 & 1Q 2011: 0.00%
(Actual total return was 0.0024%)

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns	1 Year	5 Years	10 Years	Inception Date
PACE Money Market Investments Class P	(1.97%)	(0.62%)	(0.31%)	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 November 30, 2013 (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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PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments

PACE Government 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Government Securities Fixed Income Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses PACE Government 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%	0.34%
Total annual fund operating expenses		1.05%	1.56%	0.86%
Management fee waiver/expense reimbursements	[1]	0.08%	0.09%	0.14%
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:

^[1]

Expense Example PACE Government Securities Fixed Income Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	545	761	996	1,668
Class C	225	484	841	1,849
Class Y	74	260	463	1,048

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Government Securities Fixed Income Investments Class C	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 1,046% of the average value of its portfolio.

Principal strategies

Principal investments

The fund invests in US government bonds and other bonds of varying maturities,
but normally limits its portfolio "duration" to within two years (plus or minus)
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 July 31, 2012 was 2.64 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 government fixed income
securities. There are different types of 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 also invest in investment grade bonds of non-government issuers,
including those backed by mortgages or other assets. These bonds generally have
one of the two highest credit ratings, although the fund may invest to a limited
extent in bonds with the third highest credit rating (or unrated bonds of
equivalent quality).

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 may also
invest in when-issued or delayed delivery bonds to increase its return, giving
rise to a form of leverage.

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
hold or purchase TBA securities with one coupon and short sell 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.

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.

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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total
returns table for Class C shares.

PACE Government Securities Fixed Income Investments Annual Total Returns of Class C Shares

Total return January 1 - September 30, 2012: 2.74%
Best quarter during calendar years shown--3Q 2009: 3.57%
Worst quarter during calendar years shown--2Q 2004: (1.32)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Government Securities Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	0.43%	5.18%	4.61%	Jan. 31, 2001
Class C	Class C Return before taxes	3.98%	5.64%	4.57%	Dec. 04, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	2.94%	3.91%	3.11%	Dec. 04, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	2.61%	3.82%	3.06%	Dec. 04, 2000
Class Y	Class Y Return before taxes	5.53%	6.45%	5.40%	Feb. 02, 2001
Barclays US Mortgage-Backed Securities Index	Barclays US Mortgage-Backed Securities Index (Index reflects no deduction for fees, expenses or taxes.)	6.23%	6.54%	5.69%

[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 November 30, 2013 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 November 30, 2013 (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.

XML

PACE Strategic Fixed Income Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.32%
Total annual fund operating expenses		0.82%
Management fee waiver/expense reimbursements	[1]	0.01%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Strategic Fixed Income Investments Class P	284	873	1,488	3,147

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 162% 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 two years (plus or minus) of the effective
duration of the fund's benchmark index, Barclays US Government/Credit Index,
as calculated by the investment advisor, which as of July 31, 2012 was 6.07
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, 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), 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. Interest rate futures and swaps 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 recom-mend
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.

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

Total return January 1 - September 30, 2012: 8.00%
Best quarter during calendar years shown--3Q 2009: 8.81%
Worst quarter during calendar years shown--3Q 2008: (3.38)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Strategic Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	7.58%	6.85%	5.06%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	5.65%	4.44%	3.06%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	5.14%	4.47%	3.16%	Aug. 24, 1995
Barclays US Government/ Credit Index	Barclays US Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)	8.74%	6.55%	5.85%

[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 November 30, 2013 (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 0.81%. 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 [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 242% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	242.00%
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 [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:	[1]
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 achieve its investment objective with a low correlation to market environments for traditional asset classes and as such attempts to achieve a total rate of return which exceeds the rate of return on 3-month Treasury bills by 3.00% to 4.00%, exclusive of investment management fees, on an annualized basis over a full market cycle. The fund's manager, UBS Global Asset Management (Americas) Inc. ("UBS Global AM"), does not represent or guarantee that the fund will meet this return goal, and investors should be aware that, because of the fund's complex strategies and investments, an investment in the fund involves a significantly higher risk level than an investment in US Treasury bills. 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, 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 or interest rate futures), 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. Interest rate futures and 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. Management process The fund employs a "manager of managers" structure. 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. 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 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 unlikely. 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, and foreign currencies, 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 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.
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. 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. Municipalities continue to experience difficulties in the current economic and political environment. 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 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 US Consumer Price Index (CPI) shows how the fund's performance compares to a broad indicator of inflation. 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. 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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	Total return January 1 - September 30, 2012: 5.69% Best quarter during calendar years shown-2Q 2009: 7.27% Worst quarter during calendar years shown-3Q 2008: (12.12)%
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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Citigroup Three-Month US Treasury Bill Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Citigroup Three-Month US Treasury Bill Index
1 Year	rr_AverageAnnualReturnYear01	0.08%
5 Years	rr_AverageAnnualReturnYear05	1.36%
Since Inception	rr_AverageAnnualReturnSinceInception		[2]
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Barclays Global Aggregate Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays Global Aggregate Index
1 Year	rr_AverageAnnualReturnYear01	5.64%
5 Years	rr_AverageAnnualReturnYear05	6.46%
Since Inception	rr_AverageAnnualReturnSinceInception		[3]
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | US Consumer Price Index (CPI)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	US Consumer Price Index (CPI) (Indices reflect no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	2.96%
5 Years	rr_AverageAnnualReturnYear05	2.26%
Since Inception	rr_AverageAnnualReturnSinceInception		[4]
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.42%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	rr_Component2OtherExpensesOverAssets	0.15%
Other expenses	rr_OtherExpensesOverAssets	0.57%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.12%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.09%)	[5]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	2.03%	[5]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	745
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,169
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,619
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,860
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(9.45%)
5 Years	rr_AverageAnnualReturnYear05	(3.16%)
Since Inception	rr_AverageAnnualReturnSinceInception	(1.89%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 10, 2006
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.37%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	rr_Component2OtherExpensesOverAssets	0.15%
Other expenses	rr_OtherExpensesOverAssets	0.52%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.82%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.04%)	[5]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	2.78%	[5]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	381
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	870
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,485
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,144
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	281
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	870
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,485
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	3,144
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	5.69%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	7.27%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(12.12%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(5.82%)
5 Years	rr_AverageAnnualReturnYear05	(2.78%)
Since Inception	rr_AverageAnnualReturnSinceInception	(1.58%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 11, 2006
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(5.82%)
5 Years	rr_AverageAnnualReturnYear05	(2.95%)
Since Inception	rr_AverageAnnualReturnSinceInception	(1.74%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 11, 2006
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(3.78%)
5 Years	rr_AverageAnnualReturnYear05	(2.41%)
Since Inception	rr_AverageAnnualReturnSinceInception	(1.40%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Apr. 11, 2006
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.46%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short	rr_Component2OtherExpensesOverAssets	0.15%
Other expenses	rr_OtherExpensesOverAssets	0.61%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.91%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.13%)	[5]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.78%	[5]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	181
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	587
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,020
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,222
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(4.02%)
5 Years	rr_AverageAnnualReturnYear05
Since Inception	rr_AverageAnnualReturnSinceInception	(3.42%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Jul. 23, 2008

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

[2] Average annual total returns for the Citigroup Three-Month US Treasury Bill Index for the life of each class were as follows: Class A-1.79%; Class C-1.79%; Class Y-0.27%.

[3] Average annual total returns for the Barclays Global Aggregate Index for the life of each class were as follows: Class A-6.55%; Class C-6.55%; Class Y-5.61%.

[4] Average annual total returns for the US Consumer Price Index (CPI) for the life of each class were as follows: Class A-2.02%; Class C-2.02%; Class Y-0.75%.

[5] 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 November 30, 2013 (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 1.88% for Class A, 2.63% for Class C and 1.63% 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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments
Risk Return [Abstract]	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)
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 44% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	44.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments Under normal circumstances, the fund invests at least 80% of its net assets (plus the amount of any borrowing for investment purposes) in equity securities. 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. The derivatives in which the fund may invest include futures (on indices or currencies). These derivatives may be used for risk management purposes, such as hedging the fund's security, index, currency or other exposure.    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"), J.P. Morgan Investment Management Inc. ("J.P. Morgan") and Martin Currie Inc. ("Martin Currie") 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. J.P. Morgan manages two separate segments of the fund's assets, utilizing distinct investment strategies and portfolio management for each. In managing one segment of the fund's assets, the International Research Enhanced Index Strategy segment ("International REI" segment), J.P. Morgan uses a bottom-up, research driven strategy that seeks to generate risk characteristics and maintain regional weights and sector/industry weights that are close to those of the fund's benchmark, while also capitalizing on the firm's proprietary research capabilities in seeking to generate outperformance. The strategy is driven by valuation based fundamental analysis focused on normalized earnings and earnings growth. Stock selection is the focus, and is expected to be the primary source of added value. In managing the second segment of the fund's assets, the Europe, Australasia, and Far East Opportunities Strategy segment ("EAFE Opportunities" segment), J.P. Morgan uses an active equity strategy. J.P. Morgan applies a uniform valuation methodology across regions and sectors, and analysts conduct thorough analysis with a particular emphasis on a company's normalized (or mid-cycle) earnings and their intermediate growth rate. J.P. Morgan typically focuses on the most attractive companies, within a sector, that possess a catalyst for share price appreciation. Martin Currie has a highly active "conviction" approach, seeking the best opportunities for growth across global stock markets. Martin Currie utilizes a stock-focused portfolio construction approach driven by fundamental research to attempt to exploit market inefficiencies and generate above-market performance. Martin Currie employs a consistent analytical framework to seek undervalued stocks by assessing quality, value and growth characteristics over a three- to five-year 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 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.
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 and J.P. Morgan (with respect to the International REI segment) each assumed day-to-day management of a separate portion of the fund's assets on April 1, 2004. J.P. Morgan assumed day-to-day management of a second, separate portion (the EAFE Opportunities segment) of the fund's assets on November 8, 2010. Updated performance for the fund is available at http://globalam-us.ubs.com/corpweb/performance.do. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International Equity Investments Annual Total Returns of Class P Shares
Bar Chart Does Not Reflect Sales Loads [Text]	rr_BarChartDoesNotReflectSalesLoads	The bar chart does not reflect the maximum annual PACE Select Advisors Program fee; if it did, the total returns shown would be lower.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 10.05%             Best quarter during calendar years shown--2Q 2009: 22.85%         Worst quarter during calendar years shown--3Q 2002: (22.14)%
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.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments | MSCI EAFE Index (net)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	MSCI EAFE Index (net) (Index reflects no deduction for fees and expenses.)
1 Year	rr_AverageAnnualReturnYear01	(12.14%)
5 Years	rr_AverageAnnualReturnYear05	(4.72%)
10 Years	rr_AverageAnnualReturnYear10	4.67%
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.79%
Distribution and/or service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses (includes administration fee of 0.10%)	rr_OtherExpensesOverAssets	0.39%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.18%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	321
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	980
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,664
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,485
Annual Return 2002	rr_AnnualReturn2002	(19.10%)
Annual Return 2003	rr_AnnualReturn2003	39.74%
Annual Return 2004	rr_AnnualReturn2004	18.62%
Annual Return 2005	rr_AnnualReturn2005	14.00%
Annual Return 2006	rr_AnnualReturn2006	28.46%
Annual Return 2007	rr_AnnualReturn2007	11.08%
Annual Return 2008	rr_AnnualReturn2008	(43.85%)
Annual Return 2009	rr_AnnualReturn2009	25.81%
Annual Return 2010	rr_AnnualReturn2010	4.08%
Annual Return 2011	rr_AnnualReturn2011	(9.84%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	10.05%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	22.85%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-3Q 2002:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2002
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.14%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(11.62%)
5 Years	rr_AverageAnnualReturnYear05	(7.80%)
10 Years	rr_AverageAnnualReturnYear10	1.70%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(12.10%)
5 Years	rr_AverageAnnualReturnYear05	(8.57%)
10 Years	rr_AverageAnnualReturnYear10	1.14%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(7.03%)
5 Years	rr_AverageAnnualReturnYear05	(6.39%)
10 Years	rr_AverageAnnualReturnYear10	1.64%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments
Risk Return [Abstract]	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. 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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 54% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	54.00%
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 [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:	[1]
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 (that is, companies with a total market capitalization of $3.0 billion or greater 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 Man-agement Company ("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 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE Large Co Growth 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	Total return January 1 - September 30, 2012: 15.19% Best quarter during calendar years shown--3Q 2009: 14.69% Worst quarter during calendar years shown--4Q 2008: (21.54)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Russell 1000 Growth Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	2.64%
5 Years	rr_AverageAnnualReturnYear05	2.50%
10 Years	rr_AverageAnnualReturnYear10	2.60%
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.30%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.23%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.23%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	668
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	919
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,188
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,957
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(6.70%)
5 Years	rr_AverageAnnualReturnYear05	(0.53%)
10 Years	rr_AverageAnnualReturnYear10	0.80%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.39%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.07%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.02%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	2.05%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	308
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	647
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,112
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,398
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	208
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	647
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,112
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,398
Annual Return 2002	rr_AnnualReturn2002	(31.36%)
Annual Return 2003	rr_AnnualReturn2003	28.17%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	15.19%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	14.69%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(21.54%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(3.11%)
5 Years	rr_AverageAnnualReturnYear05	(0.23%)
10 Years	rr_AverageAnnualReturnYear10	0.55%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(3.11%)
5 Years	rr_AverageAnnualReturnYear05	(0.33%)
10 Years	rr_AverageAnnualReturnYear10	0.50%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.02%)
5 Years	rr_AverageAnnualReturnYear05	(0.19%)
10 Years	rr_AverageAnnualReturnYear10	0.47%
Inception Date	rr_AverageAnnualReturnInceptionDate	Nov. 27, 2000
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.29%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.97%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.97%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	99
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	309
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	536
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,190
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(1.04%)
5 Years	rr_AverageAnnualReturnYear05	0.94%
10 Years	rr_AverageAnnualReturnYear10	1.74%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 15, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through November 30, 2013 (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 1.30% for Class A, 2.05% for Class C and 1.05% 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.

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PACE Global Real Estate Securities Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Global Real Estate Securities Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.74%	0.74%	0.69%
Total annual fund operating expenses		1.69%	2.44%	1.39%
Management fee waiver/expense reimbursements	[1]	0.24%	0.24%	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:

^[1]

Expense Example PACE Global Real Estate Securities Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	689	1,031	1,396	2,419
Class C	323	738	1,279	2,758
Class Y	122	421	742	1,652

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Global Real Estate Securities Investments Class C	223	738	1,279	2,758

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 66%
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)

Total return January 1 - September 30, 2012: 19.53%
Best quarter during calendar years shown-2Q 2009: 25.64%
Worst quarter during calendar years shown-4Q 2008: (33.27)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Global Real Estate Securities Investments	Label	1 Year	5 Years	Since Inception		Inception Date
Class A	Class A Return before taxes	(11.52%)	(9.09%)	(8.84%)		Dec. 18, 2006
Class C	Class C Return before taxes	(8.08%)	(8.79%)	(8.56%)		Dec. 18, 2006
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(8.79%)	(10.01%)	(9.81%)		Dec. 18, 2006
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(5.26%)	(7.88%)	(7.71%)		Dec. 18, 2006
Class Y	Class Y Return before taxes	(6.33%)		12.75%		Dec. 26, 2008
FTSE EPRA/NAREIT Developed Index	FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)	(5.82%)	(5.28%)		[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 November 30, 2013 (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] Average annual total returns for the FTSE EPRA/NAREIT Developed Index for the life of each class were as follows: Class A-(4.80)%; Class C-(4.80)%; Class Y-16.66%.

[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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PACE Large Co Growth Equity Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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	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%)	0.28%
Total annual fund operating expenses	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. 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 $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Large Co Growth Equity Investments Class P	299	915	1,557	3,280

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 54%
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 (that is, companies with a total market capitalization of $3.0 billion
or greater 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 Management Company ("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 sus-tained 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

Total return January 1 - September 30, 2012: 16.07%            
Best quarter during calendar years shown--3Q 2009: 15.04%        
Worst quarter during calendar years shown--4Q 2008: (21.35)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Large Co Growth Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(2.98%)	(1.12%)	(0.35%)	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(3.02%)	(1.24%)	(0.42%)	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(1.89%)	(0.94%)	(0.30%)	Aug. 24, 1995
Russell 1000 Growth Index	Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	2.64%	2.50%	2.60%

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Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 398% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	398.00%
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 [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:	[1]
Expense Example, No Redemption, By Year, Caption [Text]	rr_ExpenseExampleNoRedemptionByYearCaption	assuming no sale of shares
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) (i.e., "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 +/- 30% of the duration of the Barclays US Intermediate Government/Credit Index. During the five year period ended July 31, 2012, this index's duration ranged between 3.54 and 3.89 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, 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. Interest rate futures, swaps and swaptions 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. 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.
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. This may be particularly true for the period prior to July 29, 2002, which is the date on which BlackRock assumed day-to-day management of the fund's assets. Prior to that date, 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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	Total return January 1 - September 30, 2012: 2.99% Best quarter during calendar years shown--3Q 2009: 3.63% Worst quarter during calendar years shown--3Q 2008: (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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Barclays US Intermediate Government/Credit Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	5.80%
5 Years	rr_AverageAnnualReturnYear05	5.88%
10 Years	rr_AverageAnnualReturnYear10	5.20%
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class A
Risk Return [Abstract]	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 o the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.32%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.00%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.07%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.93%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	541
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	747
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	971
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,613
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(0.35%)
5 Years	rr_AverageAnnualReturnYear05	3.86%
10 Years	rr_AverageAnnualReturnYear10	2.99%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 31, 2001
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price o the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.51%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.08%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.43%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	221
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	469
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	816
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,795
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	146
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	469
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	816
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	1,795
Annual Return 2002	rr_AnnualReturn2002	(0.74%)
Annual Return 2003	rr_AnnualReturn2003	3.21%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	2.99%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2009:
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-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(3.87%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	3.13%
5 Years	rr_AverageAnnualReturnYear05	4.31%
10 Years	rr_AverageAnnualReturnYear10	2.94%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	2.50%
5 Years	rr_AverageAnnualReturnYear05	3.27%
10 Years	rr_AverageAnnualReturnYear10	1.89%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	2.03%
5 Years	rr_AverageAnnualReturnYear05	3.07%
10 Years	rr_AverageAnnualReturnYear10	1.88%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price o the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.45%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.88%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.20%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.68%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	69
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	261
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	468
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,066
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	4.59%
5 Years	rr_AverageAnnualReturnYear05	5.08%
10 Years	rr_AverageAnnualReturnYear10	3.72%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 02, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses of each class through November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments
Risk Return [Abstract]	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)
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 62% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	62.00%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the fund for the time periods indicated and then redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	Principal strategies
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Principal investments 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 (that is, companies with a total market capitalization of $3.0 billion or greater 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. 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"), Westwood Management Corp. ("Westwood") and Pzena Investment Management, LLC ("Pzena") 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. Westwood's strategy utilizes a value style of investing in which it chooses common stocks that it believes are currently undervalued in the market. Other key metrics for evaluating the risk/return profile of an investment include an improving return on equity, a declining debt/equity ratio and, in the case of common equities, positive earnings surprises without a corresponding increase in Wall Street estimates. Westwood has disciplines in place that serve as sell signals, such as a security reaching a predetermined price target or a change to a company's fundamentals that negatively impacts the original investment thesis. 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.
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.
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 and Westwood each assumed day-to-day management of a separate 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. Updated performance for the fund is available at http://globalam-us.ubs.com/corpweb/performance.do. After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown. In addition, the after-tax returns shown are not relevant to investors who hold fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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.
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 13.42% Best quarter during calendar years shown--2Q 2009: 18.50% Worst quarter during calendar years shown--4Q 2008: (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 (for the periods ended December 31, 2011)
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments | Russell 1000 Value Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	0.39%
5 Years	rr_AverageAnnualReturnYear05	(2.64%)
10 Years	rr_AverageAnnualReturnYear10	3.90%
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Maximum annual account fee for PACE Select Advisors Program (as a % of average value of shares held on the last calendar day of the previous quarter)	rr_MaximumAccountFeeOverAssets	2.00%
Management fees	rr_ManagementFeesOverAssets	0.65%
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	0.93%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	296
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	907
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,543
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,252
Annual Return 2002	rr_AnnualReturn2002	(16.84%)
Annual Return 2003	rr_AnnualReturn2003	26.98%
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	13.42%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	18.50%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.58%)
Label	rr_AverageAnnualReturnLabel	Class P Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(4.20%)
5 Years	rr_AverageAnnualReturnYear05	(3.97%)
10 Years	rr_AverageAnnualReturnYear10	1.51%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments | Class P | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(4.44%)
5 Years	rr_AverageAnnualReturnYear05	(4.65%)
10 Years	rr_AverageAnnualReturnYear10	0.80%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments | Class P | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class P Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.43%)
5 Years	rr_AverageAnnualReturnYear05	(3.42%)
10 Years	rr_AverageAnnualReturnYear10	1.22%
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Jul. 31, 2012
Registrant Name	dei_EntityRegistrantName	PACE SELECT ADVISORS TRUST
Central Index Key	dei_EntityCentralIndexKey	0000930007
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Nov. 28, 2012
Document Effective Date	dei_DocumentEffectiveDate	Nov. 28, 2012
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PFXAX
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PFXCX
PACE Government Securities Fixed Income Investments (First Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PFXYX
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PIFAX
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PIICX
PACE Intermediate Fixed Income Investments (First Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PIFYX
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PBNAX
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PBNCX
PACE Strategic Fixed Income Investments (First Prospectus Summary) | PACE Strategic Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PSFYX
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PMUAX
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PMUCX
PACE Municipal Fixed Income Investments (First Prospectus Summary) | PACE Municipal Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PMUYX
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWFAX
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWFCX
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWFYX
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHIAX
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHYCX
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHDYX
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCPAX
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PLVCX
PACE Large Co Value Equity Investments (First Prospectus Summary) | PACE Large Co Value Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PLVYX
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PLAAX
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PLACX
PACE Large Co Growth Equity Investments (First Prospectus Summary) | PACE Large Co Growth Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PLAYX
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PEVAX
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PEVCX
PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PVEYX
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PQUAX
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PUMCX
PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PUMYX
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWGAX
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWGCX
PACE International Equity Investments (First Prospectus Summary) | PACE International Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWIYX
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWEAX
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWECX
PACE International Emerging Markets Equity Investments (First Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PWEYX
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PREAX
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PREEX
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PREYX
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PASIX
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PASOX
PACE Alternative Strategies Investments (First Prospectus Summary) | PACE Alternative Strategies Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PASYX
PACE Money Market Investments (Prospectus Summary) | PACE Money Market Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCEXX
PACE Government Securities Fixed Income Investments (Second Prospectus Summary) | PACE Government Securities Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCGTX
PACE Intermediate Fixed Income Investments (Second Prospectus Summary) | PACE Intermediate Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCIFX
PACE Strategic Fixed Income Investments (Second Prospectus Summary) | PACE Strategic Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCSIX
PACE Municipal Fixed Income Investments (Second Prospectus Summary) | PACE Municipal Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCMNX
PACE International Fixed Income Investments (Second Prospectus Summary) | PACE International Fixed Income Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCGLX
PACE High Yield Investments (Second Prospectus Summary) | PACE High Yield Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PHYPX
PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCLVX
PACE Large Co Growth Equity Investments (Second Prospectus Summary) | PACE Large Co Growth Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCLCX
PACE Small/Medium Co Value Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Value Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCSVX
PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | PACE Small/Medium Co Growth Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCSGX
PACE International Equity Investments (Second Prospectus Summary) | PACE International Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCIEX
PACE International Emerging Markets Equity Investments (Second Prospectus Summary) | PACE International Emerging Markets Equity Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PCEMX
PACE Global Real Estate Securities Investments (Second Prospectus Summary) | PACE Global Real Estate Securities Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PREQX
PACE Alternative Strategies Investments (Second Prospectus Summary) | PACE Alternative Strategies Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Trading Symbol	dei_TradingSymbol	PASPX

XML

PACE Strategic Fixed Income Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Strategic Fixed Income Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.29%	0.27%	0.39%
Total annual fund operating expenses		1.04%	1.52%	0.89%
Management fee waiver/expense reimbursements	[1]			0.08%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.04%	1.52%	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:

^[1]

Expense Example PACE Strategic Fixed Income Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	551	766	998	1,664
Class C	230	480	829	1,813
Class Y	83	276	485	1,089

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Strategic Fixed Income Investments Class C	155	480	829	1,813

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 162% 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 two years (plus or minus) of the effective
duration of the fund's benchmark index, Barclays US Government/Credit Index,
as calculated by the investment advisor, which as of July 31, 2012 was 6.07
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, 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), 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. Interest rate futures and swaps 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. 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 invest-
  
ment 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.

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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total returns
table for Class C shares.

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

Total return January 1 - September 30, 2012: 7.44%
Best quarter during calendar years shown--3Q 2009: 8.68%
Worst quarter during calendar years shown--3Q 2008: (3.56)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Strategic Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	4.68%	7.76%	6.41%	Dec. 11, 2000
Class C	Class C Return before taxes	8.30%	8.22%	6.38%	Dec. 01, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	6.60%	6.04%	4.63%	Dec. 01, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	5.61%	5.80%	4.48%	Dec. 01, 2000
Class Y	Class Y Return before taxes	9.77%	9.06%	7.20%	Feb. 02, 2001
Barclays US Government/ Credit Index	Barclays US Government/ Credit Index (Index reflects no deduction for fees, expenses or taxes.)	8.74%	6.55%	5.85%

[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 November 30, 2013 (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.

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

XML

PACE Small/Medium Co Growth Equity Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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		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%)		0.48%
Total annual fund operating expenses		1.18%
Management fee waiver/expense reimbursements	[1]	0.05%
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:

^[1]

Expense Example (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Small/Medium Co Growth Equity Investments Class P	316	976	1,660	3,481

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 94%
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 (that is, companies
with a total market capitalization of less than $6.0 billion 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.

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") and Riverbridge
Partners, LLC ("Riverbridge") 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.

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. 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 arrange-
ments, such as 401(k) plans or individual retirement accounts.

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

Total return January 1 - September 30, 2012: 15.59%            
Best quarter during calendar years shown--2Q 2009: 20.64%        
Worst quarter during calendar years shown--4Q 2008: (26.31)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Small/Medium Co Growth Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(3.94%)	0.90%	2.66%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(3.94%)	0.27%	2.04%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(2.56%)	0.61%	2.16%	Aug. 24, 1995
Russell 2500 Growth Index	Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	(1.57%)	2.89%	5.23%

[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 November 30, 2013 (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.

XML

PACE International Emerging Markets Equity Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE International Emerging Markets Equity Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)	0.65%	0.65%	0.67%
Total annual fund operating expenses	1.90%	2.65%	1.67%

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 PACE International Emerging Markets Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	732	1,114	1,520	2,650
Class C	368	823	1,405	2,983
Class Y	170	526	907	1,976

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE International Emerging Markets Equity Investments Class C	268	823	1,405	2,983

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 30% 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.

Management process

The fund employs a "manager of managers" structure. UBS Global Asset Management
(Americas) Inc. ("UBS Global AM"), the fund's manager and primary provider of
investment advisory services, has the ultimate authority, subject to oversight
by the fund's board, to oversee the fund's investment advisor(s) and recommend
their hiring, termination and replacement. Mondrian Investment Partners Limited
("Mondrian"), William Blair & Company, L.L.C. ("William Blair") and Lee Munder
Capital Group, LLC ("Lee Munder") currently serve as the fund's investment
advisors. The relative value of each investment advisor's share of the fund's
assets may change over time.

Mondrian conducts research on a global basis in an effort to identify securities
that have the potential for capital appreciation over a market cycle, using (1)
a value-oriented dividend discount methodology toward individual securities and
(2) market analysis that attempts to identify value across country boundaries.
This approach focuses on future anticipated dividends and their current
discounted worth, and then compares the values of different possible
investments. Currency returns can be an integral component of an investment's
total return, and Mondrian uses a purchasing power parity approach to assess the
value of individual currencies. Purchasing power parity attempts to identify the
amount of goods and services that a dollar will buy in the US and compares that to
the amount of a foreign currency required to buy the same amount of goods and services
in another country.

William Blair invests in a portfolio of mid cap and large cap equity securities
issued by companies in emerging markets worldwide, according to a quality growth
philosophy. William Blair's primary focus is on identifying such companies whose
growth characteristics (rate and durability) are underestimated by the market
and supported by quality management and strong competitive positioning. After
screening the universe of emerging country issuers for certain quality, growth
and liquidity characteristics to create a prospective list of investible
securities, William Blair undertakes detailed fundamental analysis of these
companies, focusing attention on areas where short- to intermediate-term
earnings trends and overall operating performance are improving or are strong.
Key considerations are the sustainability of a company's competitive advantage
relative to peers, its industry and market conditions, a sound financial
structure and high reinvestment rates that combine to create favorable
conditions for prospective growth. William Blair normally invests on a
relatively concentrated basis, with the number of holdings ranging between 50-80
securities. To a lesser extent, William Blair also takes into account country
selection and industry sector allocation. Normally, William Blair's investments
will be allocated among at least six different countries, and no more than 50%
of its segment of the fund may be invested in securities of issuers in any one
country at any given time. William Blair may obtain exposure to emerging markets
equity securities through limited investments in investment company securities,
such as exchange-traded funds ("ETFs").

Lee Munder uses a bottom-up quantitative approach to investing in emerging
markets equity securities. Inefficiencies in the market create opportunities,
and Lee Munder believes that a quantitative process, which relies on sophisticated
mathematical or statistical models in selecting investments, is well-suited to
capture these inefficiencies and provide an opportunity to outperform the market.
Lee Munder's stock selection model groups factors used to select investments into
three major categories: market dynamics, value and quality. Market dynamic factors
are designed to exploit short term trends as Lee Munder believes investors under-react
to certain developments in the short term; value factors are intended to capture mean
reversion (i.e., a return to the average) as investors tend to overreact to certain
developments in the longer term; and quality factors incorporate information about
the quality of earnings that investors tend to overlook.

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 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.

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.

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.

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. Lee Munder assumed day-to-day management of a separate
portion of the fund's assets on October 16, 2012. Updated performance for the
fund is available at http://globalam-us.ubs.com/corpweb/performance.do.

After-tax returns are calculated using the historical highest individual federal
marginal income tax rates and do not reflect the impact of state and local
taxes. Actual after-tax returns depend on an investor's tax situation and may
differ from those shown. In addition, the after-tax returns shown are not
relevant to investors who hold fund shares through tax-deferred arrangements,
such as 401(k) plans or individual retirement accounts. After-tax returns for
other classes will vary from the Class C shares' after-tax returns shown. Prior
to September 30, 2003, Class C shares were subject to a maximum front-end sales
charge of 1.00%; this front end sales charge is not reflected in the average
annual total returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 10.89%
Best quarter during calendar years shown-2Q 2009: 31.37%
Worst quarter during calendar years shown-4Q 2008: (28.45)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Emerging Markets Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(22.51%)	(0.45%)	10.11%	Dec. 11, 2000
Class C	Class C Return before taxes	(19.36%)	(0.06%)	9.86%	Dec. 01, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(19.24%)	(1.49%)	8.82%	Dec. 01, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(12.12%)	(0.16%)	8.71%
Class Y	Class Y Return before taxes	(17.82%)	1.01%	11.10%	Feb. 09, 2001
MSCI Emerging Markets Index	MSCI Emerging Markets Index (Index reflects no deduction for fees, expenses or taxes.)	(18.17%)	2.70%	14.20%

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Money Market Investments (Prospectus Summary) | PACE Money Market Investments
Risk Return [Abstract]	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)
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:	[1]
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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
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	Total return January 1 - September 30, 2012:0.01% Best quarter during calendar years shown--4Q  2006: 1.20% Worst quarter during calendar years shown--3Q 2009, 1Q, 2Q & 3Q 2010 & 1Q 2011: 0.00% (Actual total return was 0.0024%)
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Money Market Investments (Prospectus Summary) | PACE Money Market Investments | Class P
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the offering price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
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	0.64%
Total annual fund operating expenses	rr_ExpensesOverAssets	0.89%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.29%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	0.60%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	263
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	868
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,498
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,193
Annual Return 2002	rr_AnnualReturn2002	1.48%
Annual Return 2003	rr_AnnualReturn2003	0.62%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	0.01%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-4Q 2006:
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-3Q 2009, 1Q, 2Q & 3Q 2010 & 1Q 2011:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	0.00%
1 Year	rr_AverageAnnualReturnYear01	(1.97%)
5 Years	rr_AverageAnnualReturnYear05	(0.62%)
10 Years	rr_AverageAnnualReturnYear10	(0.31%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Aug. 24, 1995

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to waive its management fees and/or reimburse expenses so that the fund's ordinary total operating expenses through November 30, 2013 (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.

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PACE Small/Medium Co Value Equity Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Small/Medium Co Value Equity Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)	0.37%	0.37%	0.46%
Total annual fund operating expenses	1.32%	2.07%	1.16%

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 PACE Small/Medium Co Value Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	677	945	1,234	2,053
Class C	310	649	1,114	2,400
Class Y	118	368	638	1,409

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Small/Medium Co Value Equity Investments Class C	210	649	1,114	2,400

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 72% 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 (that is, companies with a total market
capitalization of less than $6.0 billion 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. Prior
to September 30, 2003, Class C shares were subject to a maximum front-end sales
charge of 1.00%; this front end sales charge is not reflected in the average
annual total returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 12.11%
Best quarter during calendar years shown--2Q 2009: 27.19%
Worst quarter during calendar years shown--4Q 2008: (27.90)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Small/Medium Co Value Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(13.32%)	(1.79%)	3.60%	Nov. 27, 2000
Class C	Class C Return before taxes	(9.87%)	(1.42%)	3.39%	Nov. 27, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(9.87%)	(1.92%)	2.43%	Nov. 27, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(6.42%)	(1.31%)	2.76%	Nov. 27, 2000
Class Y	Class Y Return before taxes	(8.10%)	(0.36%)	4.51%	Dec. 20, 2000
Russell 2500 Value Index	Russell 2500 Value Index (Index reflects no deduction for fees, expenses or taxes.)	(3.36%)	(0.58%)	7.16%

XML

PACE International Fixed Income Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%	0.46%
Total annual fund operating expenses		1.27%	1.75%	1.11%
Management fee waiver/expense reimbursements	[1]	0.06%	0.06%	0.11%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.21%	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:

^[1]

Expense Example PACE International Fixed Income Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	568	829	1,110	1,910
Class C	247	545	943	2,057
Class Y	102	342	601	1,342

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE International Fixed Income Investments Class C	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 40% 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.

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.

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 move-ment. 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 credit, total return, equity,
interest rate, index, currency and variance 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.

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.

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 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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total
returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 5.32%
Best quarter during calendar years shown--3Q 2010: 11.26%
Worst quarter during calendar years shown--3Q 2008: (7.50)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(1.95%)	4.68%	6.16%	Dec. 11, 2000
Class C	Class C Return before taxes	1.43%	5.14%	6.15%	Dec. 01, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(0.89%)	3.32%	4.43%	Dec. 11, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	0.93%	3.33%	4.31%	Dec. 01, 2000
Class Y	Class Y Return before taxes	2.76%	5.94%	6.97%	Jan. 16, 2001
Barclays Global Aggregate ex US Index	Barclays Global Aggregate ex US Index (Index reflects no deduction for fees, expenses or taxes.)	4.36%	6.42%	8.29%

[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 November 30, 2013 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 November 30, 2013 (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.

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PACE Municipal Fixed Income Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees 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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.26%	0.26%	0.29%
Total annual fund operating expenses		0.95%	1.45%	0.73%
Management fee waiver/expense reimbursements	[1]	0.05%	0.05%	0.08%
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:

^[1]

Expense Example PACE Municipal Fixed Income Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	538	734	947	1,560
Class C	218	454	787	1,731
Class Y	66	225	398	899

assuming no sale of shares

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Municipal Fixed Income Investments Class C	143	454	787	1,731

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 32% 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. 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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total
returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 3.34%
Best quarter during calendar years shown--3Q 2009: 5.93%
Worst quarter during calendar years shown--4Q 2010: (3.31)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Municipal Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	4.60%	3.88%	3.60%	Jan. 23, 2001
Class C	Class C Return before taxes	8.21%	4.32%	3.54%	Dec. 04, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	8.21%	4.32%	3.54%	Dec. 04, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	6.22%	4.08%	3.43%	Dec. 04, 2000
Class Y	Class Y Return before taxes	9.78%	5.10%	4.32%	Feb. 23, 2001
Barclays US Municipal 3-15 Year Blend Index	Barclays US Municipal 3-15 Year Blend Index (Index reflects no deduction for fees, expenses or taxes.)	9.63%	5.74%	5.35%

[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 November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 20% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	20.00%
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 [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:	[1]
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 referred to 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. 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), currency forward agreements, swap agreements (specifically, 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. 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. MacKay Shields anticipates that under normal circumstances the fund's average duration will be within +/- 25% of that of the BofA Merrill Lynch Global High Yield Index. This index ordinarily has a duration of between 4 and 5 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.
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 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 credit, total return, equity, interest rate, index, currency and variance 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE High Yield Investments 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	Total return January 1 - September 30, 2012: 13.28% Best quarter during calendar years shown--2Q 2009: 20.87% Worst quarter during calendar years shown--4Q 2008: (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 (for the periods ended December 31, 2011)
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | BofA Merrill Lynch Global High Yield Index (hedged in USD)
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	BofA Merrill Lynch Global High Yield Index (hedged in USD) (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	3.18%
5 Years	rr_AverageAnnualReturnYear05	7.28%
Since Inception	rr_AverageAnnualReturnSinceInception		[2]
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.37%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.32%
Management fee waiver/expenses reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.04%)	[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.28%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	575
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	846
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,137
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,965
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	13.28%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	20.87%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(12.47%)
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(4.67%)
5 Years	rr_AverageAnnualReturnYear05	6.26%
Since Inception	rr_AverageAnnualReturnSinceInception	6.53%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 01, 2006
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class A | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class A Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(7.17%)
5 Years	rr_AverageAnnualReturnYear05	3.44%
Since Inception	rr_AverageAnnualReturnSinceInception	3.78%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 01, 2006
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class A | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class A Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(2.75%)
5 Years	rr_AverageAnnualReturnYear05	3.67%
Since Inception	rr_AverageAnnualReturnSinceInception	3.94%
Inception Date	rr_AverageAnnualReturnInceptionDate	May 01, 2006
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.32%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.77%
Management fee waiver/expenses reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.77%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	255
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	557
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	959
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,084
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	180
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	557
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	959
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,084
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(1.25%)
5 Years	rr_AverageAnnualReturnYear05
Since Inception	rr_AverageAnnualReturnSinceInception	17.99%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 21, 2009
PACE High Yield Investments (First Prospectus Summary) | PACE High Yield Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.33%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.03%
Management fee waiver/expenses reimbursements	rr_FeeWaiverOrReimbursementOverAssets		[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.03%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
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
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	0.08%
5 Years	rr_AverageAnnualReturnYear05
Since Inception	rr_AverageAnnualReturnSinceInception	22.07%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 26, 2008

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

[2] 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-7.85%; Class C-22.60%; Class Y-25.57%.

[3] 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 November 30, 2013 (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 1.28% for Class A, 1.78% for Class C and 1.03% 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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 66% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	66.00%
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 [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:	[1]
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 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 performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE 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]	rr_BarChartClosingTextBlock	Total return January 1 - September 30, 2012: 19.53% Best quarter during calendar years shown-2Q 2009: 25.64% Worst quarter during calendar years shown-4Q 2008: (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. After-tax returns for other classes will vary from the Class C shares' after-tax returns shown.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | FTSE EPRA/NAREIT Developed Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	FTSE EPRA/NAREIT Developed Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	(5.82%)
5 Years	rr_AverageAnnualReturnYear05	(5.28%)
Since Inception	rr_AverageAnnualReturnSinceInception		[2]
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.74%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.69%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.24%)	[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.45%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	689
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,031
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,396
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,419
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(11.52%)
5 Years	rr_AverageAnnualReturnYear05	(9.09%)
Since Inception	rr_AverageAnnualReturnSinceInception	(8.84%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 18, 2006
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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	0.74%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.44%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.24%)	[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	2.20%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	323
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	738
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,279
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,758
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	223
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	738
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,279
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,758
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%)
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	19.53%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-2Q 2009:
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Jun. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	25.64%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst quarter during calendar years shown-4Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(33.27%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(8.08%)
5 Years	rr_AverageAnnualReturnYear05	(8.79%)
Since Inception	rr_AverageAnnualReturnSinceInception	(8.56%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 18, 2006
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(8.79%)
5 Years	rr_AverageAnnualReturnYear05	(10.01%)
Since Inception	rr_AverageAnnualReturnSinceInception	(9.81%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 18, 2006
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	(5.26%)
5 Years	rr_AverageAnnualReturnYear05	(7.88%)
Since Inception	rr_AverageAnnualReturnSinceInception	(7.71%)
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 18, 2006
PACE Global Real Estate Securities Investments (First Prospectus Summary) | PACE Global Real Estate Securities Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	rr_RedemptionFeeOverRedemption	(1.00%)
Exchange fee	rr_ExchangeFee	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.19%)	[3]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.20%	[3]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	122
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	421
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	742
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,652
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(6.33%)
5 Years	rr_AverageAnnualReturnYear05
Since Inception	rr_AverageAnnualReturnSinceInception	12.75%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 26, 2008

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

[2] Average annual total returns for the FTSE EPRA/NAREIT Developed Index for the life of each class were as follows: Class A-(4.80)%; Class C-(4.80)%; Class Y-16.66%.

[3] 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 November 30, 2013 (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.

XML

Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Nov. 28, 2012
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments
Risk Return [Abstract]	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 105 of the prospectus and in "Reduced sales charges, additional purchase, exchange and redemption information and other services" on page 202 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 40% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	40.00%
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 [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:	[1]
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. 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.
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 move-ment. 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 credit, total return, equity, interest rate, index, currency and variance 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. 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.
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. 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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The performance information that follows shows the fund's performance information in a bar chart and an average annual total returns table.
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	http://globalam-us.ubs.com/corpweb/performance.do
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The fund's past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	PACE International 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	Total return January 1 - September 30, 2012: 5.32% Best quarter during calendar years shown--3Q 2010: 11.26% Worst quarter during calendar years shown--3Q 2008: (7.50)%
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. Prior to September 30, 2003, Class C shares were subject to a maximum front-end sales charge of 1.00%; this front end sales charge is not reflected in the average annual total returns table for Class C shares.
Caption	rr_AverageAnnualReturnCaption	Average annual total returns (for the periods ended December 31, 2011)
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Barclays Global Aggregate ex US Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Barclays Global Aggregate ex US Index (Index reflects no deduction for fees, expenses or taxes.)
1 Year	rr_AverageAnnualReturnYear01	4.36%
5 Years	rr_AverageAnnualReturnYear05	6.42%
10 Years	rr_AverageAnnualReturnYear10	8.29%
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class A
Risk Return [Abstract]	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_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.06%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.21%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	568
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	829
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,110
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,910
Label	rr_AverageAnnualReturnLabel	Class A Return before taxes
1 Year	rr_AverageAnnualReturnYear01	(1.95%)
5 Years	rr_AverageAnnualReturnYear05	4.68%
10 Years	rr_AverageAnnualReturnYear10	6.16%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 11, 2000
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	0.75%
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.06%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.69%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	247
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	545
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	943
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,057
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	172
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	545
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	943
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,057
Annual Return 2002	rr_AnnualReturn2002	16.45%
Annual Return 2003	rr_AnnualReturn2003	13.59%
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%
Year to Date Return, Label	rr_YearToDateReturnLabel	Total return January 1 - September 30, 2012:
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2012
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	5.32%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best quarter during calendar years shown-3Q 2010:
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-3Q 2008:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(7.50%)
Label	rr_AverageAnnualReturnLabel	Class C Return before taxes
1 Year	rr_AverageAnnualReturnYear01	1.43%
5 Years	rr_AverageAnnualReturnYear05	5.14%
10 Years	rr_AverageAnnualReturnYear10	6.15%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class C | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions
1 Year	rr_AverageAnnualReturnYear01	(0.89%)
5 Years	rr_AverageAnnualReturnYear05	3.32%
10 Years	rr_AverageAnnualReturnYear10	4.43%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 11, 2000
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class C | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Label	rr_AverageAnnualReturnLabel	Class C Return after taxes on distributions and sale of fund shares
1 Year	rr_AverageAnnualReturnYear01	0.93%
5 Years	rr_AverageAnnualReturnYear05	3.33%
10 Years	rr_AverageAnnualReturnYear10	4.31%
Inception Date	rr_AverageAnnualReturnInceptionDate	Dec. 01, 2000
PACE International Fixed Income Investments (First Prospectus Summary) | PACE International Fixed Income Investments | Class Y
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum front-end sales charge (load) imposed on purchases (as a % of the offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum deferred sales charge (load) (as a % of the lesser of the offering price or the redemption price)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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	0.46%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.11%
Management fee waiver/expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.11%)	[2]
Total annual fund operating expenses after fee waiver and/or expense reimbursements	rr_NetExpensesOverAssets	1.00%	[2]
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	2013-11-30
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	102
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	342
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	601
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,342
Label	rr_AverageAnnualReturnLabel	Class Y Return before taxes
1 Year	rr_AverageAnnualReturnYear01	2.76%
5 Years	rr_AverageAnnualReturnYear05	5.94%
10 Years	rr_AverageAnnualReturnYear10	6.97%
Inception Date	rr_AverageAnnualReturnInceptionDate	Jan. 16, 2001

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

[2] The fund and UBS Global Asset Management (Americas) Inc. ("UBS Global AM") have entered into a written fee waiver/expense reimbursement agreement pursuant to which UBS Global AM is contractually obligated to (1) waive its management fees through November 30, 2013 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 November 30, 2013 (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.

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PACE Intermediate Fixed Income Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Intermediate Fixed Income Investments (USD $)	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 o the redemption price)	none	0.75%	none
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.32%	0.33%	0.45%
Total annual fund operating expenses		1.00%	1.51%	0.88%
Management fee waiver/expense reimbursements	[1]	0.07%	0.08%	0.20%
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:

^[1]

Expense Example PACE Intermediate Fixed Income Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	541	747	971	1,613
Class C	221	469	816	1,795
Class Y	69	261	468	1,066

assuming no sale of shares

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Intermediate Fixed Income Investments Class C	146	469	816	1,795

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 398% 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) (i.e., "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 +/- 30% of the duration of the
Barclays US Intermediate Government/Credit Index. During the five year period
ended July 31, 2012, this index's duration ranged between 3.54 and 3.89 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, 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. Interest rate futures, swaps and swaptions
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. 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.

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 July 29, 2002, which is the date on which
BlackRock assumed day-to-day management of the fund's assets. Prior to
that date, 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. Prior to September 30, 2003, Class C
shares were subject to a maximum front-end sales charge of 1.00%; this
front end sales charge is not reflected in the average annual total
returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 2.99%
Best quarter during calendar years shown--3Q 2009: 3.63%
Worst quarter during calendar years shown--3Q 2008: (3.87)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Intermediate Fixed Income Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(0.35%)	3.86%	2.99%	Jan. 31, 2001
Class C	Class C Return before taxes	3.13%	4.31%	2.94%	Dec. 01, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	2.50%	3.27%	1.89%	Dec. 01, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	2.03%	3.07%	1.88%	Dec. 01, 2000
Class Y	Class Y Return before taxes	4.59%	5.08%	3.72%	Feb. 02, 2001
Barclays US Intermediate Government/Credit Index	Barclays US Intermediate Government/Credit Index (Index reflects no deduction for fees, expenses or taxes.)	5.80%	5.88%	5.20%

[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 November 30, 2013 (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.

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PACE Large Co Value Equity Investments (Second Prospectus Summary) | PACE Large Co Value Equity Investments

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	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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	PACE Large Co Value Equity Investments Class P
Management fees	0.65%
Distribution and/or service (12b-1) fees	none
Other expenses (includes administration fee of 0.10%)	0.28%
Total annual fund operating expenses	0.93%

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 $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE Large Co Value Equity Investments Class P	296	907	1,543	3,252

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 62%
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 (that is, companies with a
total market capitalization of $3.0 billion or greater 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.

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"),
Westwood Management Corp. ("Westwood") and Pzena Investment Management, LLC
("Pzena") 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.

Westwood's strategy utilizes a value style of investing in which it chooses
common stocks that it believes are currently undervalued in the market. Other
key metrics for evaluating the risk/return profile of an investment include an
improving return on equity, a declining debt/equity ratio and, in the case of
common equities, positive earnings surprises without a corresponding increase
in Wall Street estimates. Westwood has disciplines in place that serve as sell
signals, such as a security reaching a predetermined price target or a change to
a company's fundamentals that negatively impacts the original investment thesis.

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.

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.

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 and Westwood
each assumed day-to-day management of a separate 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. 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

Total return January 1 - September 30, 2012: 13.42%
Best quarter during calendar years shown--2Q 2009: 18.50%
Worst quarter during calendar years shown--4Q 2008: (22.58)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Large Co Value Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(4.20%)	(3.97%)	1.51%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(4.44%)	(4.65%)	0.80%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(2.43%)	(3.42%)	1.22%	Aug. 24, 1995
Russell 1000 Value Index	Russell 1000 Value Index (Index reflects no deduction for fees, expenses or taxes.)	0.39%	(2.64%)	3.90%

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PACE Large Co Growth Equity Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Large Co Growth Equity Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.30%	0.39%	0.29%
Total annual fund operating expenses		1.23%	2.07%	0.97%
Management fee waiver/expense reimbursements	[1]		0.02%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.23%	2.05%	0.97%

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:

^[1]

Expense Example PACE Large Co Growth Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	668	919	1,188	1,957
Class C	308	647	1,112	2,398
Class Y	99	309	536	1,190

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Large Co Growth Equity Investments Class C	208	647	1,112	2,398

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 54%
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 (that is, companies with a total market capitalization of $3.0
billion or greater 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 Man-agement Company
("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. Prior
to September 30, 2003, Class C shares were subject to a maximum front-end sales
charge of 1.00%; this front end sales charge is not reflected in the average
annual total returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 15.19%
Best quarter during calendar years shown--3Q 2009: 14.69%
Worst quarter during calendar years shown--4Q 2008: (21.54)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Large Co Growth Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(6.70%)	(0.53%)	0.80%	Nov. 27, 2000
Class C	Class C Return before taxes	(3.11%)	(0.23%)	0.55%	Nov. 27, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(3.11%)	(0.33%)	0.50%	Nov. 27, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(2.02%)	(0.19%)	0.47%	Nov. 27, 2000
Class Y	Class Y Return before taxes	(1.04%)	0.94%	1.74%	Feb. 15, 2001
Russell 1000 Growth Index	Russell 1000 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	2.64%	2.50%	2.60%

[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 November 30, 2013 (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 1.30% for Class A, 2.05% for Class C and 1.05% 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.

XML

PACE International Equity Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE International Equity Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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 (includes administration fee of 0.10%)	0.39%	0.48%	0.39%
Total annual fund operating expenses	1.43%	2.27%	1.18%

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 PACE International Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	688	978	1,289	2,169
Class C	330	709	1,215	2,605
Class Y	120	375	649	1,432

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE International Equity Investments Class C	230	709	1,215	2,605

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 44%
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. The
derivatives in which the fund may invest include futures (on indices or
currencies). These derivatives may be used for risk management purposes, such
as hedging the fund's security, index, currency or other exposure.

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"), J.P. Morgan Investment Management Inc. ("J.P. Morgan") and Martin
Currie Inc. ("Martin Currie") 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.

J.P. Morgan manages two separate segments of the fund's assets, utilizing
distinct investment strategies and portfolio management for each. In managing
one segment of the fund's assets, the International Research Enhanced Index
Strategy segment ("International REI" segment), J.P. Morgan uses a bottom-up,
research driven strategy that seeks to generate risk characteristics and
maintain regional weights and sector/industry weights that are close to those of
the fund's benchmark, while also capitalizing on the firm's proprietary research
capabilities in seeking to generate outperformance. The strategy is driven by
valuation based fundamental analysis focused on normalized earnings and earnings
growth. Stock selection is the focus, and is expected to be the primary source
of added value.

In managing the second segment of the fund's assets, the Europe, Australasia,
and Far East Opportunities Strategy segment ("EAFE Opportunities" segment), J.P.
Morgan uses an active equity strategy. J.P. Morgan applies a uniform valuation
methodology across regions and sectors, and analysts conduct thorough analysis
with a particular emphasis on a company's normalized (or mid-cycle) earnings
and their intermediate growth rate. J.P. Morgan typically focuses on the most
attractive companies, within a sector, that possess a catalyst for share price
appreciation.

Martin Currie has a highly active "conviction" approach, seeking the best
opportunities for growth across global stock markets. Martin Currie utilizes a
stock-focused portfolio construction approach driven by fundamental research to
attempt to exploit market inefficiencies and generate above-market performance.
Martin Currie employs a consistent analytical framework to seek undervalued
stocks by assessing quality, value and growth characteristics over a three- to
five-year 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
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.

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 and
J.P. Morgan (with respect to the International REI segment) each assumed
day-to-day management of a separate portion of the fund's assets on April 1,
2004. J.P. Morgan assumed day-to-day management of a second, separate portion
(the EAFE Opportunities segment) of the fund's assets on November 8, 2010.
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. Prior
to September 30, 2003, Class C shares were subject to a maximum front-end sales
charge of 1.00%; this front end sales charge is not reflected in the average
annual total returns table for Class C shares.

PACE International Equity Investments Annual Total Returns of Class C Shares

Total return January 1 - September 30, 2012: 9.07%
Best quarter during calendar years shown-2Q 2009: 22.47%
Worst quarter during calendar years shown-3Q 2002: (22.38)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(15.04%)	(7.22%)	2.90%	Nov. 27, 2000
Class C	Class C Return before taxes	(11.65%)	(6.95%)	2.63%	Nov. 27, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(11.91%)	(7.51%)	2.24%	Nov. 27, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(7.21%)	(5.67%)	2.46%	Nov. 27, 2000
Class Y	Class Y Return before taxes	(9.82%)	(5.87%)	3.85%	Jan. 17, 2001
MSCI EAFE Index (net)	MSCI EAFE Index (net) (Index reflects no deduction for fees and expenses.)	(12.14%)	(4.72%)	4.67%

XML

PACE Alternative Strategies Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Alternative Strategies Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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
Miscellaneous expenses (includes administration fee of 0.10%)		0.42%	0.37%	0.46%
Dividend expense, borrowing costs and related interest expense attributable to securities sold short		0.15%	0.15%	0.15%
Other expenses		0.57%	0.52%	0.61%
Total annual fund operating expenses		2.12%	2.82%	1.91%
Management fee waiver/expense reimbursements	[1]	0.09%	0.04%	0.13%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	2.03%	2.78%	1.78%

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:

^[1]

Expense Example PACE Alternative Strategies Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	745	1,169	1,619	2,860
Class C	381	870	1,485	3,144
Class Y	181	587	1,020	2,222

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Alternative Strategies Investments Class C	281	870	1,485	3,144

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 242%
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 achieve its investment objective with a low correlation to market
environments for traditional asset classes and as such attempts to achieve a
total rate of return which exceeds the rate of return on 3-month Treasury bills
by 3.00% to 4.00%, exclusive of investment management fees, on an annualized
basis over a full market cycle. The fund's manager, UBS Global Asset Management
(Americas) Inc. ("UBS Global AM"), does not represent or guarantee that the fund
will meet this return goal, and investors should be aware that, because of the
fund's complex strategies and investments, an investment in the fund involves a
significantly higher risk level than an investment in US Treasury bills.

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, 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 or interest rate futures),
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. Interest rate futures
and 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.

Management process

The fund employs a "manager of managers" structure. 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.
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 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 unlikely. 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, and foreign currencies,
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 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.

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.

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. Municipalities continue to
experience difficulties in the current economic and political environment.

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 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 US Consumer Price Index (CPI) shows how the fund's
performance compares to a broad indicator of inflation. 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. 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)

Total return January 1 - September 30, 2012: 5.69%
Best quarter during calendar years shown-2Q 2009: 7.27%
Worst quarter during calendar years shown-3Q 2008: (12.12)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Alternative Strategies Investments	Label	1 Year	5 Years	Since Inception		Inception Date
Class A	Class A Return before taxes	(9.45%)	(3.16%)	(1.89%)		Apr. 10, 2006
Class C	Class C Return before taxes	(5.82%)	(2.78%)	(1.58%)		Apr. 11, 2006
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(5.82%)	(2.95%)	(1.74%)		Apr. 11, 2006
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(3.78%)	(2.41%)	(1.40%)		Apr. 11, 2006
Class Y	Class Y Return before taxes	(4.02%)		(3.42%)		Jul. 23, 2008
Citigroup Three-Month US Treasury Bill Index	Citigroup Three-Month US Treasury Bill Index	0.08%	1.36%		[1]
Barclays Global Aggregate Index	Barclays Global Aggregate Index	5.64%	6.46%		[2]
US Consumer Price Index (CPI)	US Consumer Price Index (CPI) (Indices reflect no deduction for fees, expenses or taxes.)	2.96%	2.26%		[3]

[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 November 30, 2013 (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 1.88% for Class A, 2.63% for Class C and 1.63% 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] Average annual total returns for the Citigroup Three-Month US Treasury Bill Index for the life of each class were as follows: Class A-1.79%; Class C-1.79%; Class Y-0.27%.

[2] Average annual total returns for the Barclays Global Aggregate Index for the life of each class were as follows: Class A-6.55%; Class C-6.55%; Class Y-5.61%.

[3] Average annual total returns for the US Consumer Price Index (CPI) for the life of each class were as follows: Class A-2.02%; Class C-2.02%; Class Y-0.75%.

[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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PACE International Equity Investments (Second Prospectus Summary) | 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.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	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)	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	PACE International Equity Investments Class P
Management fees	0.79%
Distribution and/or service (12b-1) fees	none
Other expenses (includes administration fee of 0.10%)	0.39%
Total annual fund operating expenses	1.18%

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 $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
PACE International Equity Investments Class P	321	980	1,664	3,485

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 44%
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. The derivatives in which the
fund may invest include futures (on indices or currencies). These derivatives may
be used for risk management purposes, such as hedging the fund's security, index,
currency or other exposure.
  
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"), J.P. Morgan Investment Management Inc. ("J.P. Morgan") and Martin
Currie Inc. ("Martin Currie") 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.

J.P. Morgan manages two separate segments of the fund's assets, utilizing
distinct investment strategies and portfolio management for each. In managing
one segment of the fund's assets, the International Research Enhanced Index
Strategy segment ("International REI" segment), J.P. Morgan uses a bottom-up,
research driven strategy that seeks to generate risk characteristics and
maintain regional weights and sector/industry weights that are close to those of
the fund's benchmark, while also capitalizing on the firm's proprietary research
capabilities in seeking to generate outperformance. The strategy is driven by
valuation based fundamental analysis focused on normalized earnings and earnings
growth. Stock selection is the focus, and is expected to be the primary source
of added value.

In managing the second segment of the fund's assets, the Europe, Australasia,
and Far East Opportunities Strategy segment ("EAFE Opportunities" segment), J.P.
Morgan uses an active equity strategy. J.P. Morgan applies a uniform valuation
methodology across regions and sectors, and analysts conduct thorough analysis
with a particular emphasis on a company's normalized (or mid-cycle) earnings and
their intermediate growth rate. J.P. Morgan typically focuses on the most attractive
companies, within a sector, that possess a catalyst for share price appreciation.

Martin Currie has a highly active "conviction" approach, seeking the best
opportunities for growth across global stock markets. Martin Currie utilizes a
stock-focused portfolio construction approach driven by fundamental research to
attempt to exploit market inefficiencies and generate above-market performance.
Martin Currie employs a consistent analytical framework to seek undervalued
stocks by assessing quality, value and growth characteristics over a three- to
five-year 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
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.

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 and J.P. Morgan (with respect to the International
REI segment) each assumed day-to-day management of a separate portion of the
fund's assets on April 1, 2004. J.P. Morgan assumed day-to-day management of a
second, separate portion (the EAFE Opportunities segment) of the fund's assets
on November 8, 2010. 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

Total return January 1 - September 30, 2012: 10.05%            
Best quarter during calendar years shown--2Q 2009: 22.85%        
Worst quarter during calendar years shown--3Q 2002: (22.14)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE International Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class P	Class P Return before taxes	(11.62%)	(7.80%)	1.70%	Aug. 24, 1995
Class P After Taxes on Distributions	Class P Return after taxes on distributions	(12.10%)	(8.57%)	1.14%	Aug. 24, 1995
Class P After Taxes on Distributions and Sales	Class P Return after taxes on distributions and sale of fund shares	(7.03%)	(6.39%)	1.64%	Aug. 24, 1995
MSCI EAFE Index (net)	MSCI EAFE Index (net) (Index reflects no deduction for fees and expenses.)	(12.14%)	(4.72%)	4.67%

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PACE Small/Medium Co Growth Equity Investments (First Prospectus Summary) | 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 105 of the prospectus and in "Reduced sales charges, additional
purchase, exchange and redemption information and other services" on page 202 of
the fund's Statement of Additional Information.

Shareholder fees (fees paid directly from your investment)

Shareholder Fees PACE Small/Medium Co Growth Equity Investments (USD $)	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
Redemption fee (as a % of the amount redeemed within 90 days of purchase, if applicable)	1.00%	1.00%	1.00%
Exchange fee	none	none	none

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

Annual Fund Operating Expenses 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%)		0.35%	0.35%	0.55%
Total annual fund operating expenses		1.30%	2.05%	1.25%
Management fee waiver/expense reimbursements	[1]			0.12%
Total annual fund operating expenses after fee waiver and/or expense reimbursements	[1]	1.30%	2.05%	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:

^[1]

Expense Example PACE Small/Medium Co Growth Equity Investments (USD $)	Expense Example, with Redemption, 1 Year	Expense Example, with Redemption, 3 Years	Expense Example, with Redemption, 5 Years	Expense Example, with Redemption, 10 Years
Class A	675	939	1,224	2,032
Class C	308	643	1,103	2,379
Class Y	115	385	675	1,501

Expense Example, No Redemption (USD $)	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years	Expense Example, No Redemption, 5 Years	Expense Example, No Redemption, 10 Years
PACE Small/Medium Co Growth Equity Investments Class C	208	643	1,103	2,379

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 94%
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 (that is, companies
with a total market capitalization of less than $6.0 billion 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.

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") and Riverbridge
Partners, LLC ("Riverbridge") 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.

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. 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. Prior
to September 30, 2003, Class C shares were subject to a maximum front-end sales
charge of 1.00%; this front end sales charge is not reflected in the average
annual total returns table for Class C shares.

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

Total return January 1 - September 30, 2012: 14.84%
Best quarter during calendar years shown--2Q 2009: 20.34%
Worst quarter during calendar years shown--4Q 2008: (26.48)%

Average annual total returns (for the periods ended December 31, 2011)

Average Annual Total Returns PACE Small/Medium Co Growth Equity Investments	Label	1 Year	5 Years	10 Years	Inception Date
Class A	Class A Return before taxes	(7.55%)	1.58%	3.91%	Nov. 27, 2000
Class C	Class C Return before taxes	(3.88%)	1.94%	3.68%	Nov. 27, 2000
Class C After Taxes on Distributions	Class C Return after taxes on distributions	(3.88%)	1.25%	3.02%	Nov. 27, 2000
Class C After Taxes on Distributions and Sales	Class C Return after taxes on distributions and sale of fund shares	(2.52%)	1.46%	3.02%	Nov. 27, 2000
Class Y	Class Y Return before taxes	(1.98%)	3.03%	4.82%	Feb. 12, 2001
Russell 2500 Growth Index	Russell 2500 Growth Index (Index reflects no deduction for fees, expenses or taxes.)	(1.57%)	2.89%	5.23%

[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 November 30, 2013 (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.