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Risk/Return:rr_RiskReturnAbstract 
ProspectusDaterr_ProspectusDateOct. 28, 2011
UBS GLOBAL BOND FUND (Prospectus Summary) | UBS GLOBAL BOND FUND
 
Risk/Return:rr_RiskReturnAbstract 
Risk/Return, Headingrr_RiskReturnHeadingUBS Global Bond Fund Summary
Investment Objective, Headingrr_ObjectiveHeadingInvestment objective
investment Objective, Primaryrr_ObjectivePrimaryTextBlock
The Fund seeks to maximize total return, consisting of capital appreciation and
current income.
Expense, Headingrr_ExpenseHeadingFees and expenses
Expense, Narrativerr_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 a sales charge waiver or discount if you
and your family invest, or agree to invest in the future, at least $100,000 in
the Fund. 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 33 of the Fund's
prospectus and in "Reduced sales charges, additional purchase, exchange and
redemption information and other services" on page 103 of the Fund's statement
of additional information ("SAI").
Shareholder Fees, Captionrr_ShareholderFeesCaptionShareholder fees (fees paid directly from your investment)
Operating Expenses, Captionrr_OperatingExpensesCaptionAnnual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover, Headingrr_PortfolioTurnoverHeadingPortfolio turnover
Portfolio Turnoverrr_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 63%
of the average value of its portfolio.
Portfolio Turnover, Raterr_PortfolioTurnoverRate63.00%
Expense Breakpoint, Discountsrr_ExpenseBreakpointDiscountsYou may qualify for a sales charge waiver or discount if you and your family invest, or agree to invest in the future, at least $100,000 in the Fund.
Expense Breakpoint, Minimum Investment Required Amountrr_ExpenseBreakpointMinimumInvestmentRequiredAmount$ 100,000
Expense Example, Headingrr_ExpenseExampleHeadingExample
Expense Example, Narrativerr_ExpenseExampleNarrativeTextBlock
This example is intended to help you compare the cost of investing in the Fund
with the cost of investing in other mutual funds. The example assumes that you
invest $10,000 in the Fund for the time periods indicated and then sell all of
your 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. The costs described in the example reflect
the expenses of the Fund that would result from the contractual fee waiver and
expense reimbursement agreement with the Advisor for the first year only.
Although your actual costs may be higher or lower, based on these assumptions,
your costs would be:
Investment Strategy, Headingrr_StrategyHeadingPrincipal strategies
Investment Strategy, Narrativerr_StrategyNarrativeTextBlock
Principal investments

The Fund generally invests at least 65% of its net assets in investment grade
global debt securities that may also provide the potential for capital
appreciation. Under normal circumstances, the Fund invests at least 80% of its
net assets (plus borrowings for investment purposes, if any) in bonds. The Fund
is a non-diversified fund.

The Fund may invest in all types of fixed income securities of US, foreign and
emerging markets issuers. Investments in bonds may include, but are not limited
to, debt securities of governments throughout the world (including the United
States and emerging markets), their agencies and instrumentalities, debt
securities of corporations, mortgage-backed securities and asset-backed
securities. The Fund may invest in bonds of any maturity, but generally invests
in bonds having an initial maturity of more than one year. In addition, the Fund
may invest in high yield securities.

The Fund may, but is not required to, use exchange-traded or over-the-counter
derivative instruments for risk management purposes or as part of the Fund's
investment strategies. The derivatives in which the Fund may invest include
options, futures, forward agreements, swap agreements (specifically, interest
rate, total return, currency and credit default swaps), credit-linked securities
and structured investments. All of these derivatives may be used for risk
management purposes, such as hedging against a specific security or currency, or
to manage or adjust the risk profile of the Fund. In addition, all of the
derivative instruments listed above may be used for investment (non-hedging)
purposes to earn income; to enhance returns; to replace more traditional direct
investments; to obtain exposure to certain markets; to establish net short
positions for individual sectors, markets, currencies or securities; or to
adjust the Fund's portfolio duration.

Management process

With respect to the selection of securities to purchase for the Fund, the
Advisor's investment style is focused on investment fundamentals. The Advisor
believes that investment fundamentals determine and describe future cash flows
that define long term investment value. The Advisor tries to identify and
exploit periodic discrepancies between market prices and fundamental value. In
analyzing these price/value differences the Advisor also takes into account
cyclical market drivers which may influence near term dynamics of market prices.

In implementing this style, the Advisor purchases securities for the Fund by
using active asset allocation strategies across global fixed income markets and
active security selection within each market. In deciding which securities to
emphasize, the Advisor uses both quantitative and fundamental analysis to
identify securities that are under-priced relative to their fundamental value.
The valuation of asset classes reflects an integrated, fundamental analysis of
global markets.

The Advisor emphasizes those fixed income market sectors, and selects for the
Fund those securities that appear to be most undervalued relative to their
yields and potential risks. The Advisor selects individual securities for
investment by using duration, yield curve and sector analysis.
Risk, Headingrr_RiskHeadingMain risks
Risk, Narrativerr_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 the bank and is not
insured or guaranteed by the Federal Deposit Insurance Corporation or any other
government agency. Below are some of the specific risks of investing in the
Fund.

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.

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, 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 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.

High yield bond risk: The risk that the issuer of bonds with ratings of BB
(Standard & Poor's Ratings Group ("S&P")) or Ba (Moody's Investors Service, Inc.
("Moody's")) or below, or deemed of equivalent quality, will default or
otherwise be unable to honor a financial obligation. These securities are
considered to be predominately speculative with respect to an issuer's capacity
to pay interest and repay principal in accordance with the terms of the
obligations. Lower-quality bonds are more likely to be subject to an issuer's
default or downgrade than investment grade (higher-quality) bonds.

Market risk: The risk that the market value of the Fund's investments may
fluctuate, sometimes rapidly or unpredictably, as the stock and bond markets
fluctuate. Market risk may affect a single issuer, industry, or sector of the
economy, or it may affect the market as a whole.

Non-diversification risk: The Fund is a non-diversified investment company,
which means that the Fund may invest more of its assets in a smaller number of
issuers than a diversified investment company. As a non-diversified fund, the
Fund's share price may be more volatile and the Fund has a greater potential to
realize losses upon the occurrence of adverse events affecting a particular
issuer.

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. 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, 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.

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.

Management risk: The risk that the investment strategies, techniques and risk
analyses employed by the Advisor may not produce the desired results.
Risk, Lose Moneyrr_RiskLoseMoneyYou may lose money by investing in the Fund.
Risk, Nondiversified Statusrr_RiskNondiversifiedStatusThe 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 Institutionrr_RiskNotInsuredDepositoryInstitutionAn investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table, Headingrr_BarChartAndPerformanceTableHeadingPerformance
Performance, Narrativerr_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
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. Index reflects no deduction for fees, expenses or taxes. 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 Y shares' after-tax returns shown.
Performance, Information Illustrates Variability of Returnsrr_PerformanceInformationIllustratesVariabilityOfReturnsThe performance information that follows shows the Fund's performance information in a bar chart and an average annual total returns table. The information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns compare with those of a broad measure of market performance.
Performance, Availability Website Addressrr_PerformanceAvailabilityWebSiteAddressThe Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Performance, Past Does Not Indicate Futurerr_PerformancePastDoesNotIndicateFuturehttp://globalam-us.ubs.com/corpweb/performance.do
Bar Chart, Headingrr_BarChartHeadingUBS Global Bond Fund Annual Total Returns of Class Y Shares
Bar Chart, Closingrr_BarChartClosingTextBlock
Total return January 1 - September 30, 2011: 4.75%
Best quarter during calendar years shown-2Q 2002: 12.70%
Worst quarter during calendar years shown-1Q 2009: (6.93)%
Index No Deduction for Fees, Expenses, Taxesrr_IndexNoDeductionForFeesExpensesTaxesIndex reflects no deduction for fees, expenses or taxes.
Performance Table, Uses Highest Federal Raterr_PerformanceTableUsesHighestFederalRateAfter-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 Deferredrr_PerformanceTableNotRelevantToTaxDeferredthe 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 Shownrr_PerformanceTableOneClassOfAfterTaxShownAfter-tax returns for other classes will vary from the Class Y shares' after-tax returns shown.
Average Annual Returns, Captionrr_AverageAnnualReturnCaptionAverage annual total returns (for the periods ended December 31, 2010)
UBS GLOBAL BOND FUND (Prospectus Summary) | UBS GLOBAL BOND FUND | CLASS A
 
Risk/Return:rr_RiskReturnAbstract 
Fee Waiver or Reimbursement over Assets, Date of Terminationrr_FeeWaiverOrReimbursementOverAssetsDateOfTermination2012-10-27
UBS GLOBAL BOND FUND (Prospectus Summary) | UBS GLOBAL BOND FUND | CLASS B
 
Risk/Return:rr_RiskReturnAbstract 
Fee Waiver or Reimbursement over Assets, Date of Terminationrr_FeeWaiverOrReimbursementOverAssetsDateOfTermination2012-10-27
UBS GLOBAL BOND FUND (Prospectus Summary) | UBS GLOBAL BOND FUND | CLASS C
 
Risk/Return:rr_RiskReturnAbstract 
Fee Waiver or Reimbursement over Assets, Date of Terminationrr_FeeWaiverOrReimbursementOverAssetsDateOfTermination2012-10-27
UBS GLOBAL BOND FUND (Prospectus Summary) | UBS GLOBAL BOND FUND | CLASS Y
 
Risk/Return:rr_RiskReturnAbstract 
Fee Waiver or Reimbursement over Assets, Date of Terminationrr_FeeWaiverOrReimbursementOverAssetsDateOfTermination2012-10-27
Year to Date Return, Labelrr_YearToDateReturnLabelTotal return January 1 - September 30, 2011:
Bar Chart, Year to Date Return, Daterr_BarChartYearToDateReturnDateSep. 30, 2011
Bar Chart, Year to Date Returnrr_BarChartYearToDateReturn4.75%
Highest Quarterly Return, Labelrr_HighestQuarterlyReturnLabelBest quarter during calendar years shown-2Q 2002:
Highest Quarterly Return, Daterr_BarChartHighestQuarterlyReturnDateJun. 30, 2002
Highest Quarterly Returnrr_BarChartHighestQuarterlyReturn12.70%
Lowest Quarterly Return, Labelrr_LowestQuarterlyReturnLabelWorst quarter during calendar years shown-1Q 2009:
Lowest Quarterly Return, Daterr_BarChartLowestQuarterlyReturnDateMar. 31, 2009
Lowest Quarterly Returnrr_BarChartLowestQuarterlyReturn(6.93%)
UBS GLOBAL BOND FUND | Barclays Capital Global Aggregate Index
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelBarclays Capital Global Aggregate Index
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear015.54%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear056.66%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear106.73%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception [1]
UBS GLOBAL BOND FUND | CLASS A
 
Risk/Return:rr_RiskReturnAbstract 
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice4.50%
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption fee (as a % of amount redeemed within 90 days of purchase, if applicable)rr_RedemptionFeeOverRedemption(1.00%)
Management feesrr_ManagementFeesOverAssets0.65%
Distribution and/or service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets0.25%
Other expensesrr_OtherExpensesOverAssets1.53%[2]
Total annual fund operating expensesrr_ExpensesOverAssets2.43%
Less management fee waiver/expense reimbursementsrr_FeeWaiverOrReimbursementOverAssets(1.28%)
Total annual fund operating expenses after management fee waiver/expense reimbursementsrr_NetExpensesOverAssets1.15%[3]
Expense Example, With Redemption, 1 Yearrr_ExpenseExampleYear01562
Expense Example, With Redemption, 3 Yearsrr_ExpenseExampleYear031,056
Expense Example, With Redemption, 5 Yearsrr_ExpenseExampleYear051,577
Expense Example, With Redemption, 10 Yearsrr_ExpenseExampleYear102,999
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass A Return before taxes
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear01(0.24%)
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear051.09%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear10 
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception3.96%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateNov. 05, 2001
UBS GLOBAL BOND FUND | CLASS B
 
Risk/Return:rr_RiskReturnAbstract 
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)rr_MaximumDeferredSalesChargeOverOfferingPrice5.00%
Redemption fee (as a % of amount redeemed within 90 days of purchase, if applicable)rr_RedemptionFeeOverRedemption(1.00%)
Management feesrr_ManagementFeesOverAssets0.65%
Distribution and/or service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets1.00%
Other expensesrr_OtherExpensesOverAssets1.55%[2]
Total annual fund operating expensesrr_ExpensesOverAssets3.20%
Less management fee waiver/expense reimbursementsrr_FeeWaiverOrReimbursementOverAssets(1.30%)
Total annual fund operating expenses after management fee waiver/expense reimbursementsrr_NetExpensesOverAssets1.90%[3]
Expense Example, With Redemption, 1 Yearrr_ExpenseExampleYear01693
Expense Example, With Redemption, 3 Yearsrr_ExpenseExampleYear031,165
Expense Example, With Redemption, 5 Yearsrr_ExpenseExampleYear051,761
Expense Example, With Redemption, 10 Yearsrr_ExpenseExampleYear103,072
Expense Example, No Redemption, 1 Yearrr_ExpenseExampleNoRedemptionYear01193
Expense Example, No Redemption, 3 Yearsrr_ExpenseExampleNoRedemptionYear03865
Expense Example, No Redemption, 5 Yearsrr_ExpenseExampleNoRedemptionYear051,561
Expense Example, No Redemption, 10 Yearsrr_ExpenseExampleNoRedemptionYear103,072
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass B Return before taxes
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear01(1.02%)
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear050.95%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear10 
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception4.31%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateNov. 26, 2001
UBS GLOBAL BOND FUND | CLASS C
 
Risk/Return:rr_RiskReturnAbstract 
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)rr_MaximumDeferredSalesChargeOverOfferingPrice0.75%
Redemption fee (as a % of amount redeemed within 90 days of purchase, if applicable)rr_RedemptionFeeOverRedemption(1.00%)
Management feesrr_ManagementFeesOverAssets0.65%
Distribution and/or service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets0.75%
Other expensesrr_OtherExpensesOverAssets1.49%[2]
Total annual fund operating expensesrr_ExpensesOverAssets2.89%
Less management fee waiver/expense reimbursementsrr_FeeWaiverOrReimbursementOverAssets(1.24%)
Total annual fund operating expenses after management fee waiver/expense reimbursementsrr_NetExpensesOverAssets1.65%[3]
Expense Example, With Redemption, 1 Yearrr_ExpenseExampleYear01243
Expense Example, With Redemption, 3 Yearsrr_ExpenseExampleYear03778
Expense Example, With Redemption, 5 Yearsrr_ExpenseExampleYear051,414
Expense Example, With Redemption, 10 Yearsrr_ExpenseExampleYear103,125
Expense Example, No Redemption, 1 Yearrr_ExpenseExampleNoRedemptionYear01168
Expense Example, No Redemption, 3 Yearsrr_ExpenseExampleNoRedemptionYear03778
Expense Example, No Redemption, 5 Yearsrr_ExpenseExampleNoRedemptionYear051,414
Expense Example, No Redemption, 10 Yearsrr_ExpenseExampleNoRedemptionYear103,125
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass C Return before taxes[4]
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear013.16%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear051.52%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear10 
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception3.46%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateJul. 02, 2002
UBS GLOBAL BOND FUND | CLASS Y
 
Risk/Return:rr_RiskReturnAbstract 
Maximum front-end sales charge (load) imposed on purchases (as a % of offering price)rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)rr_MaximumDeferredSalesChargeOverOfferingPrice none
Redemption fee (as a % of amount redeemed within 90 days of purchase, if applicable)rr_RedemptionFeeOverRedemption(1.00%)
Management feesrr_ManagementFeesOverAssets0.65%
Distribution and/or service (12b-1) feesrr_DistributionAndService12b1FeesOverAssets none
Other expensesrr_OtherExpensesOverAssets1.48%[2]
Total annual fund operating expensesrr_ExpensesOverAssets2.13%
Less management fee waiver/expense reimbursementsrr_FeeWaiverOrReimbursementOverAssets(1.23%)
Total annual fund operating expenses after management fee waiver/expense reimbursementsrr_NetExpensesOverAssets0.90%[3]
Expense Example, With Redemption, 1 Yearrr_ExpenseExampleYear0192
Expense Example, With Redemption, 3 Yearsrr_ExpenseExampleYear03548
Expense Example, With Redemption, 5 Yearsrr_ExpenseExampleYear051,031
Expense Example, With Redemption, 10 Yearsrr_ExpenseExampleYear10$ 2,365
Annual Return 2001rr_AnnualReturn2001(1.33%)
Annual Return 2002rr_AnnualReturn200220.55%
Annual Return 2003rr_AnnualReturn200316.10%
Annual Return 2004rr_AnnualReturn20047.12%
Annual Return 2005rr_AnnualReturn2005(5.50%)
Annual Return 2006rr_AnnualReturn20065.59%
Annual Return 2007rr_AnnualReturn20072.51%
Annual Return 2008rr_AnnualReturn2008(7.56%)
Annual Return 2009rr_AnnualReturn20096.78%
Annual Return 2010rr_AnnualReturn20104.77%
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass Y Return before taxes
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear014.77%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear052.28%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear104.58%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception4.71%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateJul. 31, 1993
UBS GLOBAL BOND FUND | CLASS Y | After Taxes on Distributions
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass Y Return after taxes on distributions
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear011.63%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear05(0.11%)
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear102.68%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception2.62%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateJul. 31, 1993
UBS GLOBAL BOND FUND | CLASS Y | After Taxes on Distributions and Sales
 
Risk/Return:rr_RiskReturnAbstract 
Average Annual Returns, Labelrr_AverageAnnualReturnLabelClass Y Return after taxes on distributions and sale of fund shares
Average Annual Returns, 1 Yearrr_AverageAnnualReturnYear013.06%
Average Annual Returns, 5 Yearsrr_AverageAnnualReturnYear050.55%
Average Annual Returns, 10 Yearsrr_AverageAnnualReturnYear102.84%
Average Annual Returns, Since Inceptionrr_AverageAnnualReturnSinceInception2.77%
Average Annual Returns, Inception Daterr_AverageAnnualReturnInceptionDateJul. 31, 1993
[1]Average annual total returns for the Barclays Capital Global Aggregate Index for the life of each class were as follows: Class A--6.80%; Class B--7.14%; Class C--6.78%; Class Y--6.28%.
[2]"Other expenses" include "Acquired fund fees and expenses," which were less than 0.01% of the average net assets of the Fund.
[3]The Trust, with respect to the Fund, and UBS Global Asset Management (Americas) Inc., the Fund's investment advisor ("UBS Global AM (Americas)" or the "Advisor"), have entered into a written agreement pursuant to which the Advisor has agreed to waive a portion of its management fees and/or to reimburse expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses) to the extent necessary so that the Fund's ordinary operating expenses (excluding expenses incurred through investment in other investment companies, interest, taxes, brokerage commissions and extraordinary expenses), through the period ending October 27, 2012, do not exceed 1.15% for Class A shares, 1.90% for Class B shares, 1.65% for Class C shares and 0.90% for Class Y shares. Pursuant to the written agreement, the Advisor is entitled to be reimbursed for any fees it waives and expenses it reimburses for a period of three years following such fee waivers and expense reimbursements to the extent that such reimbursement of the Advisor by the Fund will not cause the Fund to exceed any applicable expense limit that is in place for the Fund.
[4]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 presented for the Class C shares shown above.