Label

Element

Value

Risk/Return:

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Supplement [Text Block]

ck0000886244_SupplementTextBlock

The UBS Funds

Prospectus Supplement

The UBS Funds

UBS U.S. Small Cap Growth Fund

Prospectus Supplement

March 27, 2015

Dear Investor,

The purpose of this supplement to the Prospectus of the UBS U.S. Small Cap Growth Fund series (the "Fund") of The UBS Funds (the "Trust") dated October 28, 2014, as supplemented, is to notify you that on March 5, 2015, the Board of Trustees of the Trust approved a new expense limitation agreement for the Fund. The new expense limitation agreement decreases the expense caps by 16 basis points for each class of the Fund and extends the period of the agreement from October 27, 2015 to October 27, 2016.

Therefore, on pages 25-26 of the Prospectus, the Fund's Shareholder fees, Annual fund operating expenses, and Example tables are deleted in their entirety and replaced with the following:

Risk/Return [Heading]

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UBS U.S. SMALL CAP GROWTH FUND

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2016-10-27

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

The "Less management fee waiver/expense reimbursements" and "Total annual fund operating expenses after management fee waiver/expense reimbursements" are restated to reflect a change in the Fund's expense limitation agreement.

Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text]

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

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

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then 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:

Expense Example Closing [Text Block]

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PLEASE BE SURE TO RETAIN THIS IMPORTANT INFORMATION FOR FUTURE REFERENCE.

CLASS A

Risk/Return:

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

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.50%

Maximum contingent deferred sales charge (load) (CDSC) (as a % of purchase or sales price, whichever is less)

rr_MaximumDeferredSalesChargeOverOther

none

^[1]

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management fees

rr_ManagementFeesOverAssets

0.85%

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

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other expenses

rr_OtherExpensesOverAssets

0.35%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.46%

^[2]

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.21%)

^[3]

Total annual fund operating expenses after management fee waiver/expense reimbursements

rr_NetExpensesOverAssets

1.25%

^[2],[3],[4]

Expenses Deferred Charges [Text Block]

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Purchases of $1 million or more that were not subject to a front-end sales charge are subject to a 1% CDSC if sold within one year of the purchase date.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

670

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

955

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,273

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,173

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_MaximumDeferredSalesChargeOverOther

1.00%

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management fees

rr_ManagementFeesOverAssets

0.85%

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

rr_DistributionAndService12b1FeesOverAssets

1.00%

Other expenses

rr_OtherExpensesOverAssets

0.39%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total annual fund operating expenses

rr_ExpensesOverAssets

2.25%

^[2]

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.25%)

^[3]

Total annual fund operating expenses after management fee waiver/expense reimbursements

rr_NetExpensesOverAssets

2.00%

^[2],[3],[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

303

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

664

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,168

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,553

Expense Example, No Redemption, 1 Year

rr_ExpenseExampleNoRedemptionYear01

203

Expense Example, No Redemption, 3 Years

rr_ExpenseExampleNoRedemptionYear03

664

Expense Example, No Redemption, 5 Years

rr_ExpenseExampleNoRedemptionYear05

1,168

Expense Example, No Redemption, 10 Years

rr_ExpenseExampleNoRedemptionYear10

2,553

CLASS P

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_MaximumDeferredSalesChargeOverOther

none

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management fees

rr_ManagementFeesOverAssets

0.85%

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

rr_DistributionAndService12b1FeesOverAssets

none

Other expenses

rr_OtherExpensesOverAssets

0.24%

Acquired fund fees and expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total annual fund operating expenses

rr_ExpensesOverAssets

1.10%

^[2]

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[3]

Total annual fund operating expenses after management fee waiver/expense reimbursements

rr_NetExpensesOverAssets

1.00%

^[2],[3],[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

334

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

590

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,326

[1] Purchases of $1 million or more that were not subject to a front-end sales charge are subject to a 1% CDSC if sold within one year of the purchase date.

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

[3] The "Less management fee waiver/expense reimbursements" and "Total annual fund operating expenses after management fee waiver/expense reimbursements" are restated to reflect a change in the Fund's expense limitation agreement.

[4] Effective March 27, 2015, 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, extraordinary expenses, and dividend expense and security loan fees for securities sold short) 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, extraordinary expenses, and dividend expense and security loan fees for securities sold short), through the period ending October 27, 2016, do not exceed 1.24% for Class A shares, 1.99% for Class C shares and 0.99% for Class P shares; prior to March 27, 2015, the fees were not to exceed 1.40% for Class A shares, 2.15% for Class C shares and 1.15% for Class P 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. The fee waiver/expense reimbursement agreement may be terminated by the Fund's Board of Trustees at any time and also will terminate automatically upon the expiration or termination of the Fund's advisory contract with the Advisor. Upon termination of the fee waiver/expense reimbursement agreement, however, the UBS Global AM (Americas)'s three year recoupment rights will survive.