497

COVER LETTER

April 15, 2014

Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

RE: MassMutual Premier Funds (the “Trust”)

(1933 Act File No. 33-82366; 1940 Act File No. 811-08690)

Ladies and Gentlemen:

Transmitted herewith for filing by means of electronic submission on behalf of MassMutual Premier Funds pursuant to Rule 497(e) under the Securities Act of 1933, as amended (the “Securities Act”), are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the Prospectus for Premier Value Fund, Premier Disciplined Value Fund, Premier Main Street Fund, Premier Disciplined Growth Fund, Premier Small Cap Opportunities Fund, Premier Global Fund, and Premier International Equity Fund, dated February 3, 2014, as filed under Rule 497(e) on April 1, 2014. The purpose of this filing is to submit the 497(e) filing dated April 1, 2014 in XBRL for the Funds.

Please address any questions or comments to the undersigned at (860)562-2130.

Very truly yours,

/s/ Andrew M. Goldberg

Andrew M. Goldberg

Assistant Vice President and Counsel, Massachusetts Mutual Life Insurance Company

Vice President, Secretary, and Chief Legal Officer, MassMutual Premier Funds

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier International Equity Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier International Equity Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

This Fund seeks to achieve long-term capital appreciation by investing primarily in common stock of foreign companies.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 56% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

56.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other Expenses have been restated to reflect current fees.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in the common stock of growth companies that are domiciled or that have their primary operations outside of the United States. Under normal circumstances, the Fund invests at least 80% of its net assets in securities of foreign companies. The Fund may invest 100% of its total assets in such securities. The Fund may invest in emerging markets as well as in developed markets throughout the world. From time to time, the Fund may place greater emphasis on investing in one or more particular regions (such as Asia, Europe, or Latin America). Under normal market conditions, the Fund will:

• invest at least 65% of its total assets in common and preferred stocks of issuers in at least three different countries outside of the United States, and

• emphasize investments in common stock of issuers that the portfolio manager considers to be “growth” companies.

The Fund does not limit its investments to issuers within a specific market capitalization range and at times may invest a substantial portion of its assets in one or more particular capitalization ranges. Equity securities in which the Fund invests may include common stocks, depositary receipts, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. The Fund may but will not necessarily engage in foreign currency forward contracts to take long or short positions in foreign currencies in order to enhance the Fund’s investment return or to attempt to protect against adverse changes in currency exchange rates. Use of derivatives by the Fund may create investment leverage. The Fund may hold a portion of its assets in cash or cash equivalents.

In selecting investments for the Fund, the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), evaluates investment opportunities on a company-by-company basis. OFI Global looks primarily for foreign companies with high growth potential using a “bottom up” investment approach, that is, by looking at the investment performance of individual stocks before considering the impact of general or industry-specific economic trends. This approach includes fundamental analysis of a company’s financial statements and management structure and consideration of the company’s operations, product development, and industry position.

OFI Global currently focuses on the following factors, which may vary in particular cases and may change over time:

• companies that enjoy a strong competitive position and high demand for their products or services;

• companies with accelerating earnings growth and cash flow; and

• diversity among companies, industries and countries to help reduce the risks of foreign investing, such as currency fluctuations and stock market volatility.

OFI Global also considers the effect of worldwide trends on the growth of particular business sectors and looks for companies that may benefit from those trends. The trends currently considered include: mass affluence, new technologies, restructuring, and aging. OFI Global does not invest any fixed amount of the Fund’s assets according to these criteria and the trends that are considered may change over time. OFI Global monitors individual issuers for changes in the factors above, which may trigger a decision to sell a security, but does not require a decision to do so.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Convertible Securities Risk Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities, including ADRs, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Geographic Focus Risk When a Fund focuses investments on a particular country, group of countries, or geographic region, its performance will be closely tied to the market, currency, economic, political, or regulatory conditions and developments in those countries or that region, and could be more volatile than the performance of more geographically diversified funds.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market- induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Preferred Stock Risk Preferred stocks are subject to the risks associated with other types of equity securities, as well as additional risks, such as potentially greater volatility and risks related to deferral, non-cumulative dividends, subordination, liquidity, limited voting rights, and special redemption rights.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Class R5 Shares

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest
Quarter: 2Q  '09, 22.57% Lowest
Quarter: 4Q  '08, -20.52%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class A shares of the Fund reflects any applicable sales charge.

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

Going forward, the Fund's performance benchmark index will be the MSCI^® ACWI^® ex US rather than the MSCI EAFE Index because the MSCI ACWI ex US more closely represents the Fund's investment strategy.

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

After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

MassMutual Premier International Equity Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.11%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.96%

1 Year

rr_ExpenseExampleYear01

98

3 Years

rr_ExpenseExampleYear03

306

5 Years

rr_ExpenseExampleYear05

531

10 Years

rr_ExpenseExampleYear10

1,178

One Year

rr_AverageAnnualReturnYear01

25.88%

Five Years

rr_AverageAnnualReturnYear05

17.66%

Ten Years

rr_AverageAnnualReturnYear10

9.61%

MassMutual Premier International Equity Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.21%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.06%

1 Year

rr_ExpenseExampleYear01

108

3 Years

rr_ExpenseExampleYear03

337

5 Years

rr_ExpenseExampleYear05

585

10 Years

rr_ExpenseExampleYear10

1,294

2004

rr_AnnualReturn2004

16.98%

2005

rr_AnnualReturn2005

14.55%

2006

rr_AnnualReturn2006

28.86%

2007

rr_AnnualReturn2007

13.07%

2008

rr_AnnualReturn2008

(43.13%)

2009

rr_AnnualReturn2009

39.69%

2010

rr_AnnualReturn2010

14.69%

2011

rr_AnnualReturn2011

(7.74%)

2012

rr_AnnualReturn2012

21.17%

2013

rr_AnnualReturn2013

25.88%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

22.57%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(20.52%)

One Year

rr_AverageAnnualReturnYear01

25.88%

Five Years

rr_AverageAnnualReturnYear05

17.66%

Ten Years

rr_AverageAnnualReturnYear10

9.61%

MassMutual Premier International Equity Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.16%

1 Year

rr_ExpenseExampleYear01

118

3 Years

rr_ExpenseExampleYear03

368

5 Years

rr_ExpenseExampleYear05

638

10 Years

rr_ExpenseExampleYear10

1,409

One Year

rr_AverageAnnualReturnYear01

25.84%

Five Years

rr_AverageAnnualReturnYear05

17.61%

Ten Years

rr_AverageAnnualReturnYear10

9.58%

MassMutual Premier International Equity Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.41%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.26%

1 Year

rr_ExpenseExampleYear01

128

3 Years

rr_ExpenseExampleYear03

400

5 Years

rr_ExpenseExampleYear05

692

10 Years

rr_ExpenseExampleYear10

1,523

One Year

rr_AverageAnnualReturnYear01

25.66%

Five Years

rr_AverageAnnualReturnYear05

17.43%

Ten Years

rr_AverageAnnualReturnYear10

9.41%

MassMutual Premier International Equity Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.41%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.51%

1 Year

rr_ExpenseExampleYear01

720

3 Years

rr_ExpenseExampleYear03

1,025

5 Years

rr_ExpenseExampleYear05

1,351

10 Years

rr_ExpenseExampleYear10

2,273

One Year

rr_AverageAnnualReturnYear01

18.13%

Five Years

rr_AverageAnnualReturnYear05

15.76%

Ten Years

rr_AverageAnnualReturnYear10

8.49%

MassMutual Premier International Equity Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.41%

1 Year

rr_ExpenseExampleYear01

144

3 Years

rr_ExpenseExampleYear03

446

5 Years

rr_ExpenseExampleYear05

771

10 Years

rr_ExpenseExampleYear10

1,691

One Year

rr_AverageAnnualReturnYear01

25.43%

Five Years

rr_AverageAnnualReturnYear05

17.24%

Ten Years

rr_AverageAnnualReturnYear10

9.22%

MassMutual Premier International Equity Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.66%

1 Year

rr_ExpenseExampleYear01

169

3 Years

rr_ExpenseExampleYear03

523

5 Years

rr_ExpenseExampleYear05

902

10 Years

rr_ExpenseExampleYear10

$ 1,965

One Year

rr_AverageAnnualReturnYear01

25.12%

Five Years

rr_AverageAnnualReturnYear05

16.95%

Ten Years

rr_AverageAnnualReturnYear10

8.95%

MassMutual Premier International Equity Fund | Return After Taxes on Distributions | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

23.02%

Five Years

rr_AverageAnnualReturnYear05

16.56%

Ten Years

rr_AverageAnnualReturnYear10

8.92%

MassMutual Premier International Equity Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

16.76%

Five Years

rr_AverageAnnualReturnYear05

14.56%

Ten Years

rr_AverageAnnualReturnYear10

8.05%

MassMutual Premier International Equity Fund | MSCI ACWI ex US (reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

15.29%

^[2]

Five Years

rr_AverageAnnualReturnYear05

12.81%

^[2]

Ten Years

rr_AverageAnnualReturnYear10

7.57%

^[2]

MassMutual Premier International Equity Fund | MSCI EAFE Index (reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

22.78%

Five Years

rr_AverageAnnualReturnYear05

12.44%

Ten Years

rr_AverageAnnualReturnYear10

6.91%

[1] Other Expenses have been restated to reflect current fees.

[2] Going forward, the Fund's performance benchmark index will be the MSCI® ACWI® ex US rather than the MSCI EAFE Index because the MSCI ACWI ex US more closely represents the Fund's investment strategy.

XML

MassMutual Premier Global Fund

MassMutual Premier Global Fund

INVESTMENT OBJECTIVE

The Fund seeks long-term capital appreciation.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Global Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Global Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees	[1]	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.10%	0.20%	0.30%	0.40%	0.40%	0.30%	0.30%
Total Annual Fund Operating Expenses		0.85%	0.95%	1.05%	1.15%	1.40%	1.30%	1.55%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier Global Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	87	271	471	1,049
Class R5	97	303	525	1,166
Service Class	107	334	579	1,283
Administrative Class	117	365	633	1,398
Class A	709	993	1,297	2,158
Class R4	132	412	713	1,568
Class R3	158	490	845	1,845

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 28% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common stocks of companies in the U.S. and foreign countries. The Fund can invest without limit in foreign securities, including American Depositary Receipts (“ADRs”), and can invest in any country, including developing or emerging market countries. However, the Fund currently emphasizes investments in developed markets such as the United States, Western European countries, and Japan. The Fund is not required to allocate its investments in any set percentages to any particular countries. As a fundamental policy, the Fund normally will invest in at least three countries (one of which may be the United States). Typically, the Fund invests in a number of different countries. The Fund does not limit its investments to companies in a particular market capitalization range, but currently focuses on common stocks of mid- and large-cap companies. The Fund may hold a portion of its assets in cash or cash equivalents.

In selecting securities for the Fund, the Fund’s subadviser, Oppenheimer Funds, Inc. (“OFI”), uses fundamental analysis to identify companies that it believes have high growth potential, based on its analysis of a company’s financial statements, management structure, operations and product development, and considers factors affecting the position of the company within the industry of which the issuer is part. OFI also evaluates factors affecting particular industries, market trends and general economic conditions.

OFI primarily looks for U.S. and foreign companies with high growth potential. This approach includes fundamental analysis of a company’s financial statements and management structure and consideration of the company’s operations, product development, and industry position. OFI also evaluates factors affecting particular industries, market trends and general economic conditions.

OFI currently focuses on growth-oriented companies, companies that may benefit from global growth trends at attractive valuations, companies with strong competitive positions and high demand for their products or services, and cyclical opportunities in the business cycle and sectors or industries that may benefit from those opportunities. These criteria may vary.

OFI also considers the effect of worldwide trends on the growth of particular business sectors and looks for companies that may benefit from those trends. The trends currently considered include: mass affluence, new technologies, corporate restructuring, and demographic changes. OFI does not invest any fixed amount of the Fund’s assets according to these criteria and the trends that are considered may change over time. OFI monitors individual issuers for changes in the factors above, which may trigger a decision to sell a security, but does not require a decision to do so.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities, including ADRs, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Class R5 Shares

Highest
Quarter: 2Q  '09, 23.04% Lowest Quarter: 4Q  '08, -22.19%

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Global Fund		One Year	Five Years	Since Inception	Inception Date
Class R5		26.89%	17.89%	7.44%	Dec. 31, 2004
Class R5 Return After Taxes on Distributions		26.36%	17.74%	7.07%	Dec. 31, 2004
Class R5 Return After Taxes on Distributions and Sale of Fund Shares		15.71%	14.75%	6.16%	Dec. 31, 2004
Class I		26.89%	17.89%	7.44%	Dec. 31, 2004
Service Class		26.62%	17.71%	7.28%	Dec. 31, 2004
Administrative Class		26.51%	17.58%	7.16%	Dec. 31, 2004
Class A		18.89%	15.88%	6.16%	Dec. 31, 2004
Class R4		26.44%	17.48%	6.99%	Dec. 31, 2004
Class R3		26.11%	17.16%	6.76%	Dec. 31, 2004
MSCI ACWI (reflects no deduction for fees or expenses)	[1]	22.80%	14.92%	6.30%	Dec. 31, 2004
MSCI World Index (reflects no deduction for fees or expenses)		26.68%	15.02%	6.14%	Dec. 31, 2004

[1] Management Fees and Other Expenses have been restated to reflect current fees.

[1] Going forward, the Fund's performance benchmark index will be the MSCI® ACWI® rather than the MSCI World Index because the MSCI ACWI more closely represents the Fund's investment strategy.

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MassMutual Premier Disciplined Value Fund

MassMutual Premier Disciplined Value Fund

INVESTMENT OBJECTIVE

This Fund seeks to outperform the total return performance of its benchmark index, the Russell 1000^® Value Index*, while maintaining risk characteristics similar to those of the benchmark.

* Fund is not promoted, sponsored, or endorsed by, nor in any way affiliated with Russell Investment Group ("Russell"). Russell is not responsible for and has not reviewed the Fund nor any associated literature or publications and Russell makes no representation or warranty, express or implied, as to their accuracy, or completeness, or otherwise. The Russell 1000^® Value Index and Russell^® are trademarks of the Frank Russell Company.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Disciplined Value Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Disciplined Value Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees	[1]	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.08%	0.18%	0.28%	0.38%	0.38%	0.28%	0.28%
Acquired Fund Fees and Expenses		0.02%	0.02%	0.02%	0.02%	0.02%	0.02%	0.02%
Total Annual Fund Operating Expenses	[2]	0.55%	0.65%	0.75%	0.85%	1.10%	1.00%	1.25%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier Disciplined Value Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	56	176	307	689
Class R5	66	208	362	810
Service Class	77	240	417	930
Administrative Class	87	271	471	1,049
Class A	681	905	1,146	1,838
Class R4	102	318	552	1,225
Class R3	127	397	686	1,511

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 145% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Under normal circumstances, the Fund invests substantially all (but not less than 80%) of its net assets in common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 1000^® Value Index (“Index”) (as of December 31, 2013, $1.14 billion to $504.48 billion). The Index is a market capitalization-weighted index of those stocks of the 1,000 largest US-domiciled companies that exhibit value-oriented characteristics. The Fund may use futures contracts as a substitute for direct investments. Use of derivatives by the Fund may create investment leverage.

The Fund’s subadviser, Babson Capital Management LLC (“Babson Capital”), employs quantitative analysis to identify stocks included within the Index that it believes have the potential to outperform the Index over time, using a proprietary quantitative model that ranks all stocks included in the Index based on factors such as a company’s valuation, earnings quality, stock price momentum, and earnings improvement. Based on these rankings, Babson Capital seeks to construct a broadly diversified portfolio that it believes may have the potential to produce higher returns than the Index while maintaining risk characteristics similar to the Index. Babson Capital will typically adjust Index weights to: (1) overweight high-ranking stocks, (2) underweight low-ranking stocks (or not hold them at all), and (3) market weight stocks that do not have particularly high or low rankings. Babson Capital may also consider stocks not included in the Index but with similar market capitalizations. Babson Capital does not use market timing or macro-economic forecasting in constructing the Fund’s portfolio.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Indexing Risk The Fund’s performance may not track the performance of the index exactly due to a number of factors, including fees and expenses of the Fund, and the Fund’s cash positions.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class R5, Administrative Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class, Class A, and Class R3 shares to reflect Administrative Class, Class A, and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Service Class Shares

Highest
Quarter: 3Q  '09, 17.77% Lowest Quarter: 4Q  '08, -21.87%

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. After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Disciplined Value Fund	One Year	Five Years	Ten Years
Service Class	33.33%	15.86%	7.24%
Service Class Return After Taxes on Distributions	32.80%	15.49%	6.50%
Service Class Return After Taxes on Distributions and Sale of Fund Shares	19.29%	12.86%	5.80%
Class I	33.45%	15.96%	7.39%
Class R5	33.45%	15.96%	7.39%
Administrative Class	33.13%	15.73%	7.09%
Class A	25.13%	14.03%	6.19%
Class R4	33.00%	15.56%	7.01%
Class R3	32.44%	15.07%	6.49%
Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)	32.53%	16.67%	7.58%

[1] Management Fees and Other Expenses have been restated to reflect current fees.

[2] Because Total Annual Fund Operating Expenses include Acquired Fund fees and expenses, they may not correspond to the ratios of expenses to average daily net assets shown in the "Financial Highlights" tables in the Prospectus, which reflect the operating expenses of the Fund and do not include Acquired Fund fees and expenses.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Global Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Global Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 28% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

28.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Management Fees and Other Expenses have been restated to reflect current fees.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of companies in the U.S. and foreign countries. The Fund can invest without limit in foreign securities, including American Depositary Receipts (“ADRs”), and can invest in any country, including developing or emerging market countries. However, the Fund currently emphasizes investments in developed markets such as the United States, Western European countries, and Japan. The Fund is not required to allocate its investments in any set percentages to any particular countries. As a fundamental policy, the Fund normally will invest in at least three countries (one of which may be the United States). Typically, the Fund invests in a number of different countries. The Fund does not limit its investments to companies in a particular market capitalization range, but currently focuses on common stocks of mid- and large-cap companies. The Fund may hold a portion of its assets in cash or cash equivalents.

In selecting securities for the Fund, the Fund’s subadviser, Oppenheimer Funds, Inc. (“OFI”), uses fundamental analysis to identify companies that it believes have high growth potential, based on its analysis of a company’s financial statements, management structure, operations and product development, and considers factors affecting the position of the company within the industry of which the issuer is part. OFI also evaluates factors affecting particular industries, market trends and general economic conditions.

OFI primarily looks for U.S. and foreign companies with high growth potential. This approach includes fundamental analysis of a company’s financial statements and management structure and consideration of the company’s operations, product development, and industry position. OFI also evaluates factors affecting particular industries, market trends and general economic conditions.

OFI currently focuses on growth-oriented companies, companies that may benefit from global growth trends at attractive valuations, companies with strong competitive positions and high demand for their products or services, and cyclical opportunities in the business cycle and sectors or industries that may benefit from those opportunities. These criteria may vary.

OFI also considers the effect of worldwide trends on the growth of particular business sectors and looks for companies that may benefit from those trends. The trends currently considered include: mass affluence, new technologies, corporate restructuring, and demographic changes. OFI does not invest any fixed amount of the Fund’s assets according to these criteria and the trends that are considered may change over time. OFI monitors individual issuers for changes in the factors above, which may trigger a decision to sell a security, but does not require a decision to do so.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities, including ADRs, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Class R5 Shares

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest
Quarter: 2Q  '09, 23.04% Lowest Quarter: 4Q  '08, -22.19%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class A shares of the Fund reflects any applicable sales charge.

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

Going forward, the Fund’s performance benchmark index will be the MSCI^® ACWI^® rather than the MSCI World Index because the MSCI ACWI more closely represents the Fund’s investment strategy.

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

After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

MassMutual Premier Global Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.10%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.85%

1 Year

rr_ExpenseExampleYear01

87

3 Years

rr_ExpenseExampleYear03

271

5 Years

rr_ExpenseExampleYear05

471

10 Years

rr_ExpenseExampleYear10

1,049

One Year

rr_AverageAnnualReturnYear01

26.89%

Five Years

rr_AverageAnnualReturnYear05

17.89%

Since Inception

rr_AverageAnnualReturnSinceInception

7.44%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.20%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.95%

1 Year

rr_ExpenseExampleYear01

97

3 Years

rr_ExpenseExampleYear03

303

5 Years

rr_ExpenseExampleYear05

525

10 Years

rr_ExpenseExampleYear10

1,166

2004

rr_AnnualReturn2004

2005

rr_AnnualReturn2005

13.90%

2006

rr_AnnualReturn2006

17.01%

2007

rr_AnnualReturn2007

6.79%

2008

rr_AnnualReturn2008

(41.13%)

2009

rr_AnnualReturn2009

39.91%

2010

rr_AnnualReturn2010

15.82%

2011

rr_AnnualReturn2011

(8.57%)

2012

rr_AnnualReturn2012

21.13%

2013

rr_AnnualReturn2013

26.89%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

23.04%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.19%)

One Year

rr_AverageAnnualReturnYear01

26.89%

Five Years

rr_AverageAnnualReturnYear05

17.89%

Since Inception

rr_AverageAnnualReturnSinceInception

7.44%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.05%

1 Year

rr_ExpenseExampleYear01

107

3 Years

rr_ExpenseExampleYear03

334

5 Years

rr_ExpenseExampleYear05

579

10 Years

rr_ExpenseExampleYear10

1,283

One Year

rr_AverageAnnualReturnYear01

26.62%

Five Years

rr_AverageAnnualReturnYear05

17.71%

Since Inception

rr_AverageAnnualReturnSinceInception

7.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.15%

1 Year

rr_ExpenseExampleYear01

117

3 Years

rr_ExpenseExampleYear03

365

5 Years

rr_ExpenseExampleYear05

633

10 Years

rr_ExpenseExampleYear10

1,398

One Year

rr_AverageAnnualReturnYear01

26.51%

Five Years

rr_AverageAnnualReturnYear05

17.58%

Since Inception

rr_AverageAnnualReturnSinceInception

7.16%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.40%

1 Year

rr_ExpenseExampleYear01

709

3 Years

rr_ExpenseExampleYear03

993

5 Years

rr_ExpenseExampleYear05

1,297

10 Years

rr_ExpenseExampleYear10

2,158

One Year

rr_AverageAnnualReturnYear01

18.89%

Five Years

rr_AverageAnnualReturnYear05

15.88%

Since Inception

rr_AverageAnnualReturnSinceInception

6.16%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.30%

1 Year

rr_ExpenseExampleYear01

132

3 Years

rr_ExpenseExampleYear03

412

5 Years

rr_ExpenseExampleYear05

713

10 Years

rr_ExpenseExampleYear10

1,568

One Year

rr_AverageAnnualReturnYear01

26.44%

Five Years

rr_AverageAnnualReturnYear05

17.48%

Since Inception

rr_AverageAnnualReturnSinceInception

6.99%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.55%

1 Year

rr_ExpenseExampleYear01

158

3 Years

rr_ExpenseExampleYear03

490

5 Years

rr_ExpenseExampleYear05

845

10 Years

rr_ExpenseExampleYear10

$ 1,845

One Year

rr_AverageAnnualReturnYear01

26.11%

Five Years

rr_AverageAnnualReturnYear05

17.16%

Since Inception

rr_AverageAnnualReturnSinceInception

6.76%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Return After Taxes on Distributions | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

26.36%

Five Years

rr_AverageAnnualReturnYear05

17.74%

Since Inception

rr_AverageAnnualReturnSinceInception

7.07%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

15.71%

Five Years

rr_AverageAnnualReturnYear05

14.75%

Since Inception

rr_AverageAnnualReturnSinceInception

6.16%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Global Fund | MSCI ACWI (reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

22.80%

^[2]

Five Years

rr_AverageAnnualReturnYear05

14.92%

^[2]

Since Inception

rr_AverageAnnualReturnSinceInception

6.30%

^[2]

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

^[2]

MassMutual Premier Global Fund | MSCI World Index (reflects no deduction for fees or expenses)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

26.68%

Five Years

rr_AverageAnnualReturnYear05

15.02%

Since Inception

rr_AverageAnnualReturnSinceInception

6.14%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

[1] Management Fees and Other Expenses have been restated to reflect current fees.

[2] Going forward, the Fund's performance benchmark index will be the MSCI® ACWI® rather than the MSCI World Index because the MSCI ACWI more closely represents the Fund's investment strategy.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Disciplined Growth Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Disciplined Growth Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

This Fund seeks to outperform the total return performance of its benchmark index, the Russell 1000^® Growth Index*, while maintaining risk characteristics similar to those of the benchmark.

* The Fund is not promoted, sponsored, or endorsed by, nor in any way affiliated with Russell Investment Group (“Russell”). Russell is not responsible for and has not reviewed the Fund nor any associated literature or publications and Russell makes no representation or warranty, express or implied, as to their accuracy, or completeness, or otherwise. The Russell 1000^® Growth Index and Russell^® are trademarks of the Frank Russell Company.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 153% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

153.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Management Fees and Other Expenses have been restated to reflect current fees.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests substantially all (but no less than 80%) of its net assets in common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included within the Russell 1000 Growth Index (“Index”) (as of December 31, 2013, $1.27 billion to $504.48 billion). The Index is an unmanaged index that contains those stocks with a greater than average growth orientation among the stocks of the 1000 largest U.S. companies based on total market capitalization. The Fund may use futures contracts as a substitute for direct investments. Use of derivatives by the Fund may create investment leverage.

The Fund’s subadviser, Babson Capital Management LLC (“Babson Capital”), employs quantitative analysis to identify stocks included within the Index that it believes may have the potential to outperform the Index, using a proprietary model that ranks all stocks within the Index based on factors such as a company’s valuation, earnings quality, stock price momentum, and earnings improvement. Based on these rankings, Babson Capital seeks to construct a broadly diversified portfolio that it believes may have the potential to produce higher returns than the Index while maintaining risk characteristics similar to the Index. Babson Capital will typically adjust Index weights to: (1) overweight high-ranking stocks, (2) underweight low-ranking stocks (or not hold them at all), and (3) market weight stocks that do not have particularly high or low rankings. Babson Capital may also consider stocks not included in the Index but with similar market capitalizations. Babson Capital does not use market timing or macro economic forecasting in constructing the Fund’s portfolio.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performances.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Indexing Risk The Fund’s performance may not track the performance of the index exactly due to a number of factors, including fees and expenses of the Fund, and the Fund’s cash positions.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class R5, Administrative Class, and Class A shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class and Class A shares to reflect Administrative Class and Class A expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Service Class Shares

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest Quarter: 2Q  '09, 15.54% Lowest Quarter: 4Q  '08, -22.45%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class R5, Administrative Class, and Class A shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class and Class A shares to reflect Administrative Class and Class A expenses, respectively, and for Class A shares to reflect any applicable sales charge.

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

After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

MassMutual Premier Disciplined Growth Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.08%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.53%

1 Year

rr_ExpenseExampleYear01

54

3 Years

rr_ExpenseExampleYear03

170

5 Years

rr_ExpenseExampleYear05

296

10 Years

rr_ExpenseExampleYear10

665

One Year

rr_AverageAnnualReturnYear01

35.72%

Five Years

rr_AverageAnnualReturnYear05

20.54%

Ten Years

rr_AverageAnnualReturnYear10

7.95%

MassMutual Premier Disciplined Growth Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.18%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.63%

1 Year

rr_ExpenseExampleYear01

64

3 Years

rr_ExpenseExampleYear03

202

5 Years

rr_ExpenseExampleYear05

351

10 Years

rr_ExpenseExampleYear10

786

One Year

rr_AverageAnnualReturnYear01

35.72%

Five Years

rr_AverageAnnualReturnYear05

20.54%

Ten Years

rr_AverageAnnualReturnYear10

7.95%

MassMutual Premier Disciplined Growth Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.73%

1 Year

rr_ExpenseExampleYear01

75

3 Years

rr_ExpenseExampleYear03

233

5 Years

rr_ExpenseExampleYear05

406

10 Years

rr_ExpenseExampleYear10

906

2004

rr_AnnualReturn2004

6.87%

2005

rr_AnnualReturn2005

5.57%

2006

rr_AnnualReturn2006

9.39%

2007

rr_AnnualReturn2007

11.80%

2008

rr_AnnualReturn2008

(38.71%)

2009

rr_AnnualReturn2009

34.95%

2010

rr_AnnualReturn2010

16.60%

2011

rr_AnnualReturn2011

2.23%

2012

rr_AnnualReturn2012

16.19%

2013

rr_AnnualReturn2013

35.51%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

15.54%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.45%)

One Year

rr_AverageAnnualReturnYear01

35.51%

Five Years

rr_AverageAnnualReturnYear05

20.42%

Ten Years

rr_AverageAnnualReturnYear10

7.91%

MassMutual Premier Disciplined Growth Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.38%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.83%

1 Year

rr_ExpenseExampleYear01

85

3 Years

rr_ExpenseExampleYear03

265

5 Years

rr_ExpenseExampleYear05

460

10 Years

rr_ExpenseExampleYear10

1,025

One Year

rr_AverageAnnualReturnYear01

35.38%

Five Years

rr_AverageAnnualReturnYear05

20.30%

Ten Years

rr_AverageAnnualReturnYear10

7.76%

MassMutual Premier Disciplined Growth Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.38%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.08%

1 Year

rr_ExpenseExampleYear01

679

3 Years

rr_ExpenseExampleYear03

899

5 Years

rr_ExpenseExampleYear05

1,136

10 Years

rr_ExpenseExampleYear10

1,816

One Year

rr_AverageAnnualReturnYear01

27.35%

Five Years

rr_AverageAnnualReturnYear05

18.56%

Ten Years

rr_AverageAnnualReturnYear10

6.86%

MassMutual Premier Disciplined Growth Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.98%

1 Year

rr_ExpenseExampleYear01

100

3 Years

rr_ExpenseExampleYear03

312

5 Years

rr_ExpenseExampleYear05

542

10 Years

rr_ExpenseExampleYear10

1,201

One Year

rr_AverageAnnualReturnYear01

35.26%

Five Years

rr_AverageAnnualReturnYear05

20.12%

Ten Years

rr_AverageAnnualReturnYear10

7.58%

MassMutual Premier Disciplined Growth Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.23%

1 Year

rr_ExpenseExampleYear01

125

3 Years

rr_ExpenseExampleYear03

390

5 Years

rr_ExpenseExampleYear05

676

10 Years

rr_ExpenseExampleYear10

$ 1,489

One Year

rr_AverageAnnualReturnYear01

34.93%

Five Years

rr_AverageAnnualReturnYear05

19.83%

Ten Years

rr_AverageAnnualReturnYear10

7.31%

MassMutual Premier Disciplined Growth Fund | Return After Taxes on Distributions | Service Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

26.95%

Five Years

rr_AverageAnnualReturnYear05

18.69%

Ten Years

rr_AverageAnnualReturnYear10

6.99%

MassMutual Premier Disciplined Growth Fund | Return After Taxes on Distributions and Sale of Fund Shares | Service Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

22.35%

Five Years

rr_AverageAnnualReturnYear05

16.21%

Ten Years

rr_AverageAnnualReturnYear10

6.18%

MassMutual Premier Disciplined Growth Fund | Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

33.48%

Five Years

rr_AverageAnnualReturnYear05

20.39%

Ten Years

rr_AverageAnnualReturnYear10

7.83%

[1] Management Fees and Other Expenses have been restated to reflect current fees.

XML

MassMutual Premier International Equity Fund

MassMutual Premier International Equity Fund

INVESTMENT OBJECTIVE

This Fund seeks to achieve long-term capital appreciation by investing primarily in common stock of foreign companies.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier International Equity Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier International Equity Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees		0.85%	0.85%	0.85%	0.85%	0.85%	0.85%	0.85%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.11%	0.21%	0.31%	0.41%	0.41%	0.31%	0.31%
Total Annual Fund Operating Expenses		0.96%	1.06%	1.16%	1.26%	1.51%	1.41%	1.66%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier International Equity Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	98	306	531	1,178
Class R5	108	337	585	1,294
Service Class	118	368	638	1,409
Administrative Class	128	400	692	1,523
Class A	720	1,025	1,351	2,273
Class R4	144	446	771	1,691
Class R3	169	523	902	1,965

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 56% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in the common stock of growth companies that are domiciled or that have their primary operations outside of the United States. Under normal circumstances, the Fund invests at least 80% of its net assets in securities of foreign companies. The Fund may invest 100% of its total assets in such securities. The Fund may invest in emerging markets as well as in developed markets throughout the world. From time to time, the Fund may place greater emphasis on investing in one or more particular regions (such as Asia, Europe, or Latin America). Under normal market conditions, the Fund will:

• invest at least 65% of its total assets in common and preferred stocks of issuers in at least three different countries outside of the United States, and

• emphasize investments in common stock of issuers that the portfolio manager considers to be “growth” companies.

The Fund does not limit its investments to issuers within a specific market capitalization range and at times may invest a substantial portion of its assets in one or more particular capitalization ranges. Equity securities in which the Fund invests may include common stocks, depositary receipts, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. The Fund may but will not necessarily engage in foreign currency forward contracts to take long or short positions in foreign currencies in order to enhance the Fund’s investment return or to attempt to protect against adverse changes in currency exchange rates. Use of derivatives by the Fund may create investment leverage. The Fund may hold a portion of its assets in cash or cash equivalents.

In selecting investments for the Fund, the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), evaluates investment opportunities on a company-by-company basis. OFI Global looks primarily for foreign companies with high growth potential using a “bottom up” investment approach, that is, by looking at the investment performance of individual stocks before considering the impact of general or industry-specific economic trends. This approach includes fundamental analysis of a company’s financial statements and management structure and consideration of the company’s operations, product development, and industry position.

OFI Global currently focuses on the following factors, which may vary in particular cases and may change over time:

• companies that enjoy a strong competitive position and high demand for their products or services;

• companies with accelerating earnings growth and cash flow; and

• diversity among companies, industries and countries to help reduce the risks of foreign investing, such as currency fluctuations and stock market volatility.

OFI Global also considers the effect of worldwide trends on the growth of particular business sectors and looks for companies that may benefit from those trends. The trends currently considered include: mass affluence, new technologies, restructuring, and aging. OFI Global does not invest any fixed amount of the Fund’s assets according to these criteria and the trends that are considered may change over time. OFI Global monitors individual issuers for changes in the factors above, which may trigger a decision to sell a security, but does not require a decision to do so.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Convertible Securities Risk Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities, including ADRs, are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Geographic Focus Risk When a Fund focuses investments on a particular country, group of countries, or geographic region, its performance will be closely tied to the market, currency, economic, political, or regulatory conditions and developments in those countries or that region, and could be more volatile than the performance of more geographically diversified funds.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market- induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Preferred Stock Risk Preferred stocks are subject to the risks associated with other types of equity securities, as well as additional risks, such as potentially greater volatility and risks related to deferral, non-cumulative dividends, subordination, liquidity, limited voting rights, and special redemption rights.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Class R5 Shares

Highest
Quarter: 2Q  '09, 22.57% Lowest
Quarter: 4Q  '08, -20.52%

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier International Equity Fund		One Year	Five Years	Ten Years
Class R5		25.88%	17.66%	9.61%
Class R5 Return After Taxes on Distributions		23.02%	16.56%	8.92%
Class R5 Return After Taxes on Distributions and Sale of Fund Shares		16.76%	14.56%	8.05%
Class I		25.88%	17.66%	9.61%
Service Class		25.84%	17.61%	9.58%
Administrative Class		25.66%	17.43%	9.41%
Class A		18.13%	15.76%	8.49%
Class R4		25.43%	17.24%	9.22%
Class R3		25.12%	16.95%	8.95%
MSCI ACWI ex US (reflects no deduction for fees or expenses)	[1]	15.29%	12.81%	7.57%
MSCI EAFE Index (reflects no deduction for fees or expenses)		22.78%	12.44%	6.91%

[1] Other Expenses have been restated to reflect current fees.

[1] Going forward, the Fund's performance benchmark index will be the MSCI® ACWI® ex US rather than the MSCI EAFE Index because the MSCI ACWI ex US more closely represents the Fund's investment strategy.

XML

MassMutual Premier Small Cap Opportunities Fund

MassMutual Premier Small Cap Opportunities Fund

INVESTMENT OBJECTIVE

This Fund seeks capital appreciation.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Small Cap Opportunities Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Small Cap Opportunities Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees		0.58%	0.58%	0.58%	0.58%	0.58%	0.58%	0.58%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.10%	0.20%	0.30%	0.40%	0.40%	0.30%	0.30%
Total Annual Fund Operating Expenses		0.68%	0.78%	0.88%	0.98%	1.23%	1.13%	1.38%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be at the end of each period:

Expense Example MassMutual Premier Small Cap Opportunities Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	69	218	379	847
Class R5	80	249	433	966
Service Class	90	281	488	1,084
Administrative Class	100	312	542	1,201
Class A	693	943	1,212	1,978
Class R4	115	359	622	1,375
Class R3	140	437	755	1,657

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 91% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common stocks of small-capitalization U.S. companies that the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), believes have favorable business trends or prospects based on fundamental analysis. Under normal circumstances, the Fund invests at least 80% of its net assets in securities of small-cap companies. The subadviser currently considers “small-cap” companies to be those whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 2000^® Index (as of December 31, 2013, between $14 million and $5.28 billion). The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities, including emerging market securities. The Fund generally will not invest more than 15% of its total assets in foreign securities. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically uses fundamental research to select securities for the Fund’s portfolio, which is comprised of both growth and value stocks. While the process may change over time or vary in particular cases, in general the selection process currently uses:

• a fundamental approach in analyzing issuers based on factors such as a company’s financial performance, competitive strength, position in the industry, and strength of business model and management. OFI Global may also consider an industry’s outlook, market trends and general economic conditions.

The Fund aims to maintain a broadly diversified portfolio across all major economic sectors by applying investment parameters for both sector and position size. OFI Global may consider selling a security if, for example, in its judgment, a stock’s price is approaching its target, a company’s competitive position deteriorates, a company’s management is executing strategy poorly, or more attractive alternative investment ideas have been identified.

In constructing the portfolio, the Fund seeks to limit exposure to so-called “top-down” or “macro” risks, such as overall stock market movements, economic cycles, and interest rate or currency fluctuations. Instead, the portfolio managers seek to add value by selecting individual securities with superior company-specific fundamental attributes or relative valuations that they expect to outperform their industry and sector peers. This is commonly referred to as a “bottom-up” approach to portfolio construction. The portfolio managers consider stock rankings, benchmark weightings, and capitalization outlooks in determining security weightings for individual issuers.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class A shares. The returns in the bar chart do not reflect the deduction of any applicable Class A sales charge. If these charges were reflected, returns would be lower than those shown. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. The Fund’s investment strategy changed in September 2006 in connection with a change in portfolio managers of the Fund. In addition, the Fund expanded its investment universe to include investing in mid cap companies in May of 2011. In April of 2013 the Fund returned to focusing on small cap companies. The performance results shown would not necessarily have been achieved had the Fund’s current investment strategy been in effect for the entire period for which performance results are presented. Performance for Class R5, Service Class, and Administrative Class shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Class A shares, and adjusted for Class A to reflect any applicable sales charges. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Class A Shares

Highest
Quarter: 2Q  '09, 31.59% Lowest
Quarter: 4Q  '08, -27.32%

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. After-tax returns 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 are shown for Class A only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Small Cap Opportunities Fund		One Year	Five Years	Ten Years
Class A		32.42%	20.80%	6.98%
Class A Return After Taxes on Distributions		32.19%	20.70%	5.57%
Class A Return After Taxes on Distributions and Sale of Fund Shares		18.47%	17.05%	5.39%
Class I		41.16%	22.79%	8.14%
Class R5		41.16%	22.79%	8.14%
Service Class		41.02%	22.68%	8.04%
Administrative Class		40.82%	22.59%	7.93%
Class R4		40.68%	22.36%	7.76%
Class R3		40.34%	22.06%	7.50%
Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)	[1]	38.82%	20.08%	9.07%
Russell 2500 Index (reflects no deduction for fees, expenses, or taxes)		36.80%	21.77%	9.81%

[1] Other Expenses have been restated to reflect current fees.

[1] Going forward, the Fund’s performance benchmark index will be the Russell 2000® Index rather than the Russell 2500™ Index because the Russell 2000® Index more closely represents the Fund’s current investment strategy.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Value Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Value Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

This Fund seeks to achieve long-term capital appreciation primarily through investment in a portfolio of common stocks of established companies.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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

January 31, 2016

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 150% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

150.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other Expenses have been restated to reflect current fees.

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

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This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

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The Fund invests primarily in common stocks of companies with varying market capitalizations that the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), believes are undervalued in the marketplace. While the Fund does not limit its investments to issuers in a particular capitalization range, OFI Global currently focuses on securities of larger size companies. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities, including emerging market securities. Equity securities may include common stocks, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. The Fund may invest up to 25% of its total assets in foreign securities of companies or governments in any country, including developed and emerging countries. The Fund may invest up to 10% of its net assets in debt securities. The Fund may purchase and sell exchange-traded and over-the-counter options for hedging purposes or to take long or short positions on one or more equity securities. Use of derivatives by the Fund may create investment leverage. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically employs a bottom-up approach in selecting securities for the Fund, using fundamental analysis to select securities that it believes are undervalued. While this process may change over time and vary in particular cases, OFI Global generally may consider a variety of factors in evaluating a company, such as attractive valuation, future supply/demand for key products, product cycles, quality of management, competitive position, cash reinvestment plans, and better-than-expected earnings reports. OFI Global may consider selling a security if, for example, in OFI Global’s judgment, the stock’s price is approaching its target, the company’s fundamentals are deteriorating, or more attractive alternative investment ideas have been identified.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Risk [Heading]

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Principal Risks

Risk Narrative [Text Block]

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The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Convertible Securities Risk Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Fixed Income Securities Risk The values of fixed income securities typically will decline during periods of rising interest rates, and can also decline in response to changes in the financial condition of the issuer, borrower, counterparty, or underlying collateral assets, or changes in market, economic, industry, political, and regulatory conditions affecting a particular type of security or issuer or fixed income securities generally. Fixed income securities are subject to interest rate risk (the risk that the value of a fixed income security will fall when interest rates rise), extension risk (the risk that the average life of a security will be extended through a slowing of principal payments), prepayment risk (the risk that a security will be prepaid and the Fund will be required to reinvest at a less favorable rate), and credit risk.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term goals). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Preferred Stock Risk Preferred stocks are subject to the risks associated with other types of equity securities, as well as additional risks, such as potentially greater volatility and risks related to deferral, non-cumulative dividends, subordination, liquidity, limited voting rights, and special redemption rights.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Risk Lose Money [Text]

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You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

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Performance Information

Performance Narrative [Text Block]

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The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Administrative Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance (Russell 1000^® Value Index) and an additional index that provides a comparison for the Fund’s returns without regard to investment style. Performance for Class R5, Service Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Administrative Class shares, adjusted for Class A and Class R3 shares to reflect Class A and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Administrative Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance (Russell 1000^® Value Index) and an additional index that provides a comparison for the Fund’s returns without regard to investment style.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance (Russell 1000^® Value Index) and an additional index that provides a comparison for the Fund’s returns without regard to investment style.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

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Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

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Annual Performance

Administrative Class Shares

Bar Chart Closing [Text Block]

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Highest
Quarter: 2Q  '09, 19.56% Lowest Quarter: 4Q  '08, -26.63%

Performance Table Heading

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Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

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Performance for Class R5, Service Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Administrative Class shares, adjusted for Class A and Class R3 shares to reflect Class A and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge.

Performance Table Uses Highest Federal Rate

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After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

Performance Table Not Relevant to Tax Deferred

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After-tax returns are not relevant to investors who hold Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

Performance Table One Class of after Tax Shown [Text]

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After-tax returns are shown for Administrative Class only. After-tax returns for other classes will vary.

Performance Table Narrative

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After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. After-tax returns 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 are shown for Administrative Class only. After-tax returns for other classes will vary.

MassMutual Premier Value Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.12%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.62%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

0.60%

^[2]

1 Year

rr_ExpenseExampleYear01

61

3 Years

rr_ExpenseExampleYear03

195

5 Years

rr_ExpenseExampleYear05

342

10 Years

rr_ExpenseExampleYear10

771

One Year

rr_AverageAnnualReturnYear01

30.63%

Five Years

rr_AverageAnnualReturnYear05

17.08%

Ten Years

rr_AverageAnnualReturnYear10

6.47%

MassMutual Premier Value Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.22%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.72%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

0.70%

^[2]

1 Year

rr_ExpenseExampleYear01

72

3 Years

rr_ExpenseExampleYear03

226

5 Years

rr_ExpenseExampleYear05

397

10 Years

rr_ExpenseExampleYear10

891

One Year

rr_AverageAnnualReturnYear01

30.63%

Five Years

rr_AverageAnnualReturnYear05

17.08%

Ten Years

rr_AverageAnnualReturnYear10

6.47%

MassMutual Premier Value Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.32%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.82%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

0.80%

^[2]

1 Year

rr_ExpenseExampleYear01

82

3 Years

rr_ExpenseExampleYear03

258

5 Years

rr_ExpenseExampleYear05

451

10 Years

rr_ExpenseExampleYear10

1,010

One Year

rr_AverageAnnualReturnYear01

30.52%

Five Years

rr_AverageAnnualReturnYear05

16.96%

Ten Years

rr_AverageAnnualReturnYear10

6.36%

MassMutual Premier Value Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.42%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.92%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

0.90%

^[2]

1 Year

rr_ExpenseExampleYear01

92

3 Years

rr_ExpenseExampleYear03

290

5 Years

rr_ExpenseExampleYear05

506

10 Years

rr_ExpenseExampleYear10

1,128

2004

rr_AnnualReturn2004

16.02%

2005

rr_AnnualReturn2005

1.59%

2006

rr_AnnualReturn2006

15.55%

2007

rr_AnnualReturn2007

6.19%

2008

rr_AnnualReturn2008

(41.73%)

2009

rr_AnnualReturn2009

33.77%

2010

rr_AnnualReturn2010

14.94%

2011

rr_AnnualReturn2011

(4.69%)

2012

rr_AnnualReturn2012

13.94%

2013

rr_AnnualReturn2013

30.43%

Highest Quarterly Return, Label

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Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

19.56%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.63%)

One Year

rr_AverageAnnualReturnYear01

30.43%

Five Years

rr_AverageAnnualReturnYear05

16.84%

Ten Years

rr_AverageAnnualReturnYear10

6.26%

MassMutual Premier Value Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.42%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.17%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

1.15%

^[2]

1 Year

rr_ExpenseExampleYear01

685

3 Years

rr_ExpenseExampleYear03

922

5 Years

rr_ExpenseExampleYear05

1,178

10 Years

rr_ExpenseExampleYear10

1,911

One Year

rr_AverageAnnualReturnYear01

22.57%

Five Years

rr_AverageAnnualReturnYear05

15.15%

Ten Years

rr_AverageAnnualReturnYear10

5.33%

MassMutual Premier Value Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.32%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.07%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[2]

1 Year

rr_ExpenseExampleYear01

107

3 Years

rr_ExpenseExampleYear03

337

5 Years

rr_ExpenseExampleYear05

586

10 Years

rr_ExpenseExampleYear10

1,302

One Year

rr_AverageAnnualReturnYear01

30.18%

Five Years

rr_AverageAnnualReturnYear05

16.68%

Ten Years

rr_AverageAnnualReturnYear10

6.10%

MassMutual Premier Value Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.32%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.32%

Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

Total Annual Fund Operating Expenses after Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[2]

1 Year

rr_ExpenseExampleYear01

132

3 Years

rr_ExpenseExampleYear03

415

5 Years

rr_ExpenseExampleYear05

720

10 Years

rr_ExpenseExampleYear10

$ 1,587

One Year

rr_AverageAnnualReturnYear01

29.61%

Five Years

rr_AverageAnnualReturnYear05

16.14%

Ten Years

rr_AverageAnnualReturnYear10

5.63%

MassMutual Premier Value Fund | Return After Taxes on Distributions | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

29.99%

Five Years

rr_AverageAnnualReturnYear05

16.55%

Ten Years

rr_AverageAnnualReturnYear10

5.61%

MassMutual Premier Value Fund | Return After Taxes on Distributions and Sale of Fund Shares | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

17.57%

Five Years

rr_AverageAnnualReturnYear05

13.70%

Ten Years

rr_AverageAnnualReturnYear10

5.02%

MassMutual Premier Value Fund | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.53%

Five Years

rr_AverageAnnualReturnYear05

16.67%

Ten Years

rr_AverageAnnualReturnYear10

7.58%

MassMutual Premier Value Fund | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.39%

Five Years

rr_AverageAnnualReturnYear05

17.94%

Ten Years

rr_AverageAnnualReturnYear10

7.41%

[1] Other Expenses have been restated to reflect current fees.

[2] The expenses in the above table reflect a written agreement by MML Advisers to cap the fees and expenses of the Fund (other than extraordinary litigation and legal expenses, Acquired Fund fees and expenses, interest expense, short sale dividend and loan expense, or other non-recurring or unusual expenses such as, for example, organizational expenses and shareholder meeting expenses) through January 31, 2016, to the extent that Total Annual Fund Operating Expenses after Expense Reimbursement would otherwise exceed .60%, .70%, .80%, .90%, 1.15%, 1.05%, and 1.30% for Classes I, R5, Service, Administrative, A, R4, and R3, respectively. The Total Annual Fund Operating Expenses after Expense Reimbursement shown in the above table may exceed these amounts, because, as noted in the previous sentence, certain fees and expenses are excluded from the cap. The agreement can only be terminated by mutual consent of the Board of Trustees on behalf of the Fund and MML Advisers.

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MassMutual Premier Value Fund

MassMutual Premier Value Fund

INVESTMENT OBJECTIVE

This Fund seeks to achieve long-term capital appreciation primarily through investment in a portfolio of common stocks of established companies.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Value Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Value Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees		0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.12%	0.22%	0.32%	0.42%	0.42%	0.32%	0.32%
Total Annual Fund Operating Expenses		0.62%	0.72%	0.82%	0.92%	1.17%	1.07%	1.32%
Expense Reimbursement		(0.02%)	(0.02%)	(0.02%)	(0.02%)	(0.02%)	(0.02%)	(0.02%)
Total Annual Fund Operating Expenses after Expense Reimbursement	[2]	0.60%	0.70%	0.80%	0.90%	1.15%	1.05%	1.30%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier Value Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	61	195	342	771
Class R5	72	226	397	891
Service Class	82	258	451	1,010
Administrative Class	92	290	506	1,128
Class A	685	922	1,178	1,911
Class R4	107	337	586	1,302
Class R3	132	415	720	1,587

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 150% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common stocks of companies with varying market capitalizations that the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), believes are undervalued in the marketplace. While the Fund does not limit its investments to issuers in a particular capitalization range, OFI Global currently focuses on securities of larger size companies. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities, including emerging market securities. Equity securities may include common stocks, preferred stocks, securities convertible into common or preferred stock, rights, and warrants. The Fund may invest up to 25% of its total assets in foreign securities of companies or governments in any country, including developed and emerging countries. The Fund may invest up to 10% of its net assets in debt securities. The Fund may purchase and sell exchange-traded and over-the-counter options for hedging purposes or to take long or short positions on one or more equity securities. Use of derivatives by the Fund may create investment leverage. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically employs a bottom-up approach in selecting securities for the Fund, using fundamental analysis to select securities that it believes are undervalued. While this process may change over time and vary in particular cases, OFI Global generally may consider a variety of factors in evaluating a company, such as attractive valuation, future supply/demand for key products, product cycles, quality of management, competitive position, cash reinvestment plans, and better-than-expected earnings reports. OFI Global may consider selling a security if, for example, in OFI Global’s judgment, the stock’s price is approaching its target, the company’s fundamentals are deteriorating, or more attractive alternative investment ideas have been identified.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Convertible Securities Risk Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Fixed Income Securities Risk The values of fixed income securities typically will decline during periods of rising interest rates, and can also decline in response to changes in the financial condition of the issuer, borrower, counterparty, or underlying collateral assets, or changes in market, economic, industry, political, and regulatory conditions affecting a particular type of security or issuer or fixed income securities generally. Fixed income securities are subject to interest rate risk (the risk that the value of a fixed income security will fall when interest rates rise), extension risk (the risk that the average life of a security will be extended through a slowing of principal payments), prepayment risk (the risk that a security will be prepaid and the Fund will be required to reinvest at a less favorable rate), and credit risk.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term goals). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Preferred Stock Risk Preferred stocks are subject to the risks associated with other types of equity securities, as well as additional risks, such as potentially greater volatility and risks related to deferral, non-cumulative dividends, subordination, liquidity, limited voting rights, and special redemption rights.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Administrative Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance (Russell 1000^® Value Index) and an additional index that provides a comparison for the Fund’s returns without regard to investment style. Performance for Class R5, Service Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Administrative Class shares, adjusted for Class A and Class R3 shares to reflect Class A and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Administrative Class Shares

Highest
Quarter: 2Q  '09, 19.56% Lowest Quarter: 4Q  '08, -26.63%

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. After-tax returns 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 are shown for Administrative Class only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Value Fund	One Year	Five Years	Ten Years
Administrative Class	30.43%	16.84%	6.26%
Administrative Class Return After Taxes on Distributions	29.99%	16.55%	5.61%
Administrative Class Return After Taxes on Distributions and Sale of Fund Shares	17.57%	13.70%	5.02%
Class I	30.63%	17.08%	6.47%
Class R5	30.63%	17.08%	6.47%
Service Class	30.52%	16.96%	6.36%
Class A	22.57%	15.15%	5.33%
Class R4	30.18%	16.68%	6.10%
Class R3	29.61%	16.14%	5.63%
Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)	32.53%	16.67%	7.58%
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)	32.39%	17.94%	7.41%

[1] Other Expenses have been restated to reflect current fees.

[2] The expenses in the above table reflect a written agreement by MML Advisers to cap the fees and expenses of the Fund (other than extraordinary litigation and legal expenses, Acquired Fund fees and expenses, interest expense, short sale dividend and loan expense, or other non-recurring or unusual expenses such as, for example, organizational expenses and shareholder meeting expenses) through January 31, 2016, to the extent that Total Annual Fund Operating Expenses after Expense Reimbursement would otherwise exceed .60%, .70%, .80%, .90%, 1.15%, 1.05%, and 1.30% for Classes I, R5, Service, Administrative, A, R4, and R3, respectively. The Total Annual Fund Operating Expenses after Expense Reimbursement shown in the above table may exceed these amounts, because, as noted in the previous sentence, certain fees and expenses are excluded from the cap. The agreement can only be terminated by mutual consent of the Board of Trustees on behalf of the Fund and MML Advisers.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Main Street Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Main Street Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Fund seeks a high total return.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 43% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

43.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Management Fees and Other Expenses have been restated to reflect current fees.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of U.S. companies of different capitalization ranges. The Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), currently focuses on “large capitalization” issuers, which are considered to be companies with market capitalizations at the time of purchase within the market capitalization range of companies included within the Russell 1000^® Index (as of December 31, 2013, $1.14 billion to $504.48 billion), although it may purchase stocks of companies with any market capitalization. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities. The Fund generally will not invest more than 15% of its total assets in foreign securities. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically uses fundamental research and quantitative models to select securities for the Fund’s portfolio, which is comprised of both growth and value stocks. While the process may change over time or vary in particular cases, in general the selection process currently uses:

• a fundamental approach in analyzing issuers based on factors such as a company’s financial performance and prospects, industry position, and business model and management strength. OFI Global may also consider industry outlook, market trends and general economic conditions.

• quantitative models to rank securities within each sector to identify potential buy and sell candidates for further fundamental analysis. A number of company-specific factors are analyzed in constructing the models, including valuation, fundamentals and momentum.

The portfolio is constructed and regularly monitored based upon several analytical tools, including quantitative investment models.

The Fund aims to maintain a broadly diversified portfolio across all major economic sectors by applying investment parameters for both sector and position size. OFI Global may consider selling a security if, for example, in its judgment, a stock’s price is approaching its target, a company’s competitive position deteriorates, it believes that a company’s management is executing strategy poorly, or more attractive alternative investment ideas have been identified.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund's shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager's ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund's portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security's intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Class R5 Shares

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest Quarter: 2Q  '09, 18.61% Lowest Quarter: 4Q  '08, -22.19%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class A shares of the Fund reflects any applicable sales charge.

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

After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

MassMutual Premier Main Street Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.09%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.64%

1 Year

rr_ExpenseExampleYear01

65

3 Years

rr_ExpenseExampleYear03

205

5 Years

rr_ExpenseExampleYear05

357

10 Years

rr_ExpenseExampleYear10

798

One Year

rr_AverageAnnualReturnYear01

31.77%

Five Years

rr_AverageAnnualReturnYear05

18.12%

Since Inception

rr_AverageAnnualReturnSinceInception

6.72%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.19%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.74%

1 Year

rr_ExpenseExampleYear01

76

3 Years

rr_ExpenseExampleYear03

237

5 Years

rr_ExpenseExampleYear05

411

10 Years

rr_ExpenseExampleYear10

918

2004

rr_AnnualReturn2004

2005

rr_AnnualReturn2005

5.93%

2006

rr_AnnualReturn2006

15.14%

2007

rr_AnnualReturn2007

4.32%

2008

rr_AnnualReturn2008

(38.62%)

2009

rr_AnnualReturn2009

28.79%

2010

rr_AnnualReturn2010

16.16%

2011

rr_AnnualReturn2011

(0.17%)

2012

rr_AnnualReturn2012

16.84%

2013

rr_AnnualReturn2013

31.77%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.61%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.19%)

One Year

rr_AverageAnnualReturnYear01

31.77%

Five Years

rr_AverageAnnualReturnYear05

18.12%

Since Inception

rr_AverageAnnualReturnSinceInception

6.72%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.29%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.84%

1 Year

rr_ExpenseExampleYear01

86

3 Years

rr_ExpenseExampleYear03

268

5 Years

rr_ExpenseExampleYear05

466

10 Years

rr_ExpenseExampleYear10

1,037

One Year

rr_AverageAnnualReturnYear01

31.67%

Five Years

rr_AverageAnnualReturnYear05

18.11%

Since Inception

rr_AverageAnnualReturnSinceInception

6.61%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.39%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.94%

1 Year

rr_ExpenseExampleYear01

96

3 Years

rr_ExpenseExampleYear03

300

5 Years

rr_ExpenseExampleYear05

520

10 Years

rr_ExpenseExampleYear10

1,155

One Year

rr_AverageAnnualReturnYear01

31.52%

Five Years

rr_AverageAnnualReturnYear05

17.91%

Since Inception

rr_AverageAnnualReturnSinceInception

6.48%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.39%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.19%

1 Year

rr_ExpenseExampleYear01

689

3 Years

rr_ExpenseExampleYear03

931

5 Years

rr_ExpenseExampleYear05

1,192

10 Years

rr_ExpenseExampleYear10

1,935

One Year

rr_AverageAnnualReturnYear01

23.72%

Five Years

rr_AverageAnnualReturnYear05

16.22%

Since Inception

rr_AverageAnnualReturnSinceInception

5.51%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.29%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.09%

1 Year

rr_ExpenseExampleYear01

111

3 Years

rr_ExpenseExampleYear03

347

5 Years

rr_ExpenseExampleYear05

601

10 Years

rr_ExpenseExampleYear10

1,329

One Year

rr_AverageAnnualReturnYear01

31.32%

Five Years

rr_AverageAnnualReturnYear05

17.71%

Since Inception

rr_AverageAnnualReturnSinceInception

6.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.55%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.29%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.34%

1 Year

rr_ExpenseExampleYear01

136

3 Years

rr_ExpenseExampleYear03

425

5 Years

rr_ExpenseExampleYear05

734

10 Years

rr_ExpenseExampleYear10

$ 1,613

One Year

rr_AverageAnnualReturnYear01

30.81%

Five Years

rr_AverageAnnualReturnYear05

17.24%

Since Inception

rr_AverageAnnualReturnSinceInception

5.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Return After Taxes on Distributions | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

31.50%

Five Years

rr_AverageAnnualReturnYear05

17.92%

Since Inception

rr_AverageAnnualReturnSinceInception

6.03%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class R5

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

18.20%

Five Years

rr_AverageAnnualReturnYear05

14.77%

Since Inception

rr_AverageAnnualReturnSinceInception

5.32%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

MassMutual Premier Main Street Fund | S&P 500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.39%

Five Years

rr_AverageAnnualReturnYear05

17.94%

Since Inception

rr_AverageAnnualReturnSinceInception

7.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2004

[1] Management Fees and Other Expenses have been restated to reflect current fees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Small Cap Opportunities Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Small Cap Opportunities Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

This Fund seeks capital appreciation.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 91% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

91.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Other Expenses have been restated to reflect current fees.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be at the end of each period:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Fund invests primarily in common stocks of small-capitalization U.S. companies that the Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), believes have favorable business trends or prospects based on fundamental analysis. Under normal circumstances, the Fund invests at least 80% of its net assets in securities of small-cap companies. The subadviser currently considers “small-cap” companies to be those whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 2000^® Index (as of December 31, 2013, between $14 million and $5.28 billion). The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities, including emerging market securities. The Fund generally will not invest more than 15% of its total assets in foreign securities. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically uses fundamental research to select securities for the Fund’s portfolio, which is comprised of both growth and value stocks. While the process may change over time or vary in particular cases, in general the selection process currently uses:

• a fundamental approach in analyzing issuers based on factors such as a company’s financial performance, competitive strength, position in the industry, and strength of business model and management. OFI Global may also consider an industry’s outlook, market trends and general economic conditions.

The Fund aims to maintain a broadly diversified portfolio across all major economic sectors by applying investment parameters for both sector and position size. OFI Global may consider selling a security if, for example, in its judgment, a stock’s price is approaching its target, a company’s competitive position deteriorates, a company’s management is executing strategy poorly, or more attractive alternative investment ideas have been identified.

In constructing the portfolio, the Fund seeks to limit exposure to so-called “top-down” or “macro” risks, such as overall stock market movements, economic cycles, and interest rate or currency fluctuations. Instead, the portfolio managers seek to add value by selecting individual securities with superior company-specific fundamental attributes or relative valuations that they expect to outperform their industry and sector peers. This is commonly referred to as a “bottom-up” approach to portfolio construction. The portfolio managers consider stock rankings, benchmark weightings, and capitalization outlooks in determining security weightings for individual issuers.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund’s shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class A shares. The returns in the bar chart do not reflect the deduction of any applicable Class A sales charge. If these charges were reflected, returns would be lower than those shown. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. The Fund’s investment strategy changed in September 2006 in connection with a change in portfolio managers of the Fund. In addition, the Fund expanded its investment universe to include investing in mid cap companies in May of 2011. In April of 2013 the Fund returned to focusing on small cap companies. The performance results shown would not necessarily have been achieved had the Fund’s current investment strategy been in effect for the entire period for which performance results are presented. Performance for Class R5, Service Class, and Administrative Class shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Class A shares, and adjusted for Class A to reflect any applicable sales charges. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Class A shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Class A Shares

Bar Chart Does Not Reflect Sales Loads [Text]

rr_BarChartDoesNotReflectSalesLoads

The returns in the bar chart do not reflect the deduction of any applicable Class A sales charge. If these charges were reflected, returns would be lower than those shown.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest
Quarter: 2Q  '09, 31.59% Lowest
Quarter: 4Q  '08, -27.32%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class R5, Service Class, and Administrative Class shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Class A shares, and adjusted for Class A to reflect any applicable sales charges.

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

Going forward, the Fund’s performance benchmark index will be the Russell 2000^® Index rather than the Russell 2500™ Index because the Russell 2000^® Index more closely represents the Fund’s current investment strategy.

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

After-tax returns 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 are shown for Class A only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Class A only. After-tax returns for other classes will vary.

MassMutual Premier Small Cap Opportunities Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.10%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.68%

1 Year

rr_ExpenseExampleYear01

69

3 Years

rr_ExpenseExampleYear03

218

5 Years

rr_ExpenseExampleYear05

379

10 Years

rr_ExpenseExampleYear10

847

One Year

rr_AverageAnnualReturnYear01

41.16%

Five Years

rr_AverageAnnualReturnYear05

22.79%

Ten Years

rr_AverageAnnualReturnYear10

8.14%

MassMutual Premier Small Cap Opportunities Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.20%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.78%

1 Year

rr_ExpenseExampleYear01

80

3 Years

rr_ExpenseExampleYear03

249

5 Years

rr_ExpenseExampleYear05

433

10 Years

rr_ExpenseExampleYear10

966

One Year

rr_AverageAnnualReturnYear01

41.16%

Five Years

rr_AverageAnnualReturnYear05

22.79%

Ten Years

rr_AverageAnnualReturnYear10

8.14%

MassMutual Premier Small Cap Opportunities Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.88%

1 Year

rr_ExpenseExampleYear01

90

3 Years

rr_ExpenseExampleYear03

281

5 Years

rr_ExpenseExampleYear05

488

10 Years

rr_ExpenseExampleYear10

1,084

One Year

rr_AverageAnnualReturnYear01

41.02%

Five Years

rr_AverageAnnualReturnYear05

22.68%

Ten Years

rr_AverageAnnualReturnYear10

8.04%

MassMutual Premier Small Cap Opportunities Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.98%

1 Year

rr_ExpenseExampleYear01

100

3 Years

rr_ExpenseExampleYear03

312

5 Years

rr_ExpenseExampleYear05

542

10 Years

rr_ExpenseExampleYear10

1,201

One Year

rr_AverageAnnualReturnYear01

40.82%

Five Years

rr_AverageAnnualReturnYear05

22.59%

Ten Years

rr_AverageAnnualReturnYear10

7.93%

MassMutual Premier Small Cap Opportunities Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.23%

1 Year

rr_ExpenseExampleYear01

693

3 Years

rr_ExpenseExampleYear03

943

5 Years

rr_ExpenseExampleYear05

1,212

10 Years

rr_ExpenseExampleYear10

1,978

2004

rr_AnnualReturn2004

15.59%

2005

rr_AnnualReturn2005

(0.30%)

2006

rr_AnnualReturn2006

9.13%

2007

rr_AnnualReturn2007

(1.61%)

2008

rr_AnnualReturn2008

(38.30%)

2009

rr_AnnualReturn2009

37.18%

2010

rr_AnnualReturn2010

23.28%

2011

rr_AnnualReturn2011

(2.53%)

2012

rr_AnnualReturn2012

17.85%

2013

rr_AnnualReturn2013

40.50%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

31.59%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(27.32%)

One Year

rr_AverageAnnualReturnYear01

32.42%

Five Years

rr_AverageAnnualReturnYear05

20.80%

Ten Years

rr_AverageAnnualReturnYear10

6.98%

MassMutual Premier Small Cap Opportunities Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.13%

1 Year

rr_ExpenseExampleYear01

115

3 Years

rr_ExpenseExampleYear03

359

5 Years

rr_ExpenseExampleYear05

622

10 Years

rr_ExpenseExampleYear10

1,375

One Year

rr_AverageAnnualReturnYear01

40.68%

Five Years

rr_AverageAnnualReturnYear05

22.36%

Ten Years

rr_AverageAnnualReturnYear10

7.76%

MassMutual Premier Small Cap Opportunities Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.58%

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.38%

1 Year

rr_ExpenseExampleYear01

140

3 Years

rr_ExpenseExampleYear03

437

5 Years

rr_ExpenseExampleYear05

755

10 Years

rr_ExpenseExampleYear10

$ 1,657

One Year

rr_AverageAnnualReturnYear01

40.34%

Five Years

rr_AverageAnnualReturnYear05

22.06%

Ten Years

rr_AverageAnnualReturnYear10

7.50%

MassMutual Premier Small Cap Opportunities Fund | Return After Taxes on Distributions | Class A

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.19%

Five Years

rr_AverageAnnualReturnYear05

20.70%

Ten Years

rr_AverageAnnualReturnYear10

5.57%

MassMutual Premier Small Cap Opportunities Fund | Return After Taxes on Distributions and Sale of Fund Shares | Class A

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

18.47%

Five Years

rr_AverageAnnualReturnYear05

17.05%

Ten Years

rr_AverageAnnualReturnYear10

5.39%

MassMutual Premier Small Cap Opportunities Fund | Russell 2000 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

38.82%

^[2]

Five Years

rr_AverageAnnualReturnYear05

20.08%

^[2]

Ten Years

rr_AverageAnnualReturnYear10

9.07%

^[2]

MassMutual Premier Small Cap Opportunities Fund | Russell 2500 Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

36.80%

Five Years

rr_AverageAnnualReturnYear05

21.77%

Ten Years

rr_AverageAnnualReturnYear10

9.81%

[1] Other Expenses have been restated to reflect current fees.

[2] Going forward, the Fund’s performance benchmark index will be the Russell 2000® Index rather than the Russell 2500™ Index because the Russell 2000® Index more closely represents the Fund’s current investment strategy.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	Other
Document Period End Date	dei_DocumentPeriodEndDate	Sep. 30, 2013
Registrant Name	dei_EntityRegistrantName	MASSMUTUAL PREMIER FUNDS
Central Index Key	dei_EntityCentralIndexKey	0000927972
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 01, 2014
Document Effective Date	dei_DocumentEffectiveDate	Apr. 01, 2014
Prospectus Date	rr_ProspectusDate	Feb. 03, 2014

XML

MassMutual Premier Disciplined Growth Fund

MassMutual Premier Disciplined Growth Fund

INVESTMENT OBJECTIVE

This Fund seeks to outperform the total return performance of its benchmark index, the Russell 1000^® Growth Index*, while maintaining risk characteristics similar to those of the benchmark.

* The Fund is not promoted, sponsored, or endorsed by, nor in any way affiliated with Russell Investment Group (“Russell”). Russell is not responsible for and has not reviewed the Fund nor any associated literature or publications and Russell makes no representation or warranty, express or implied, as to their accuracy, or completeness, or otherwise. The Russell 1000^® Growth Index and Russell^® are trademarks of the Frank Russell Company.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Disciplined Growth Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Disciplined Growth Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees	[1]	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.08%	0.18%	0.28%	0.38%	0.38%	0.28%	0.28%
Total Annual Fund Operating Expenses		0.53%	0.63%	0.73%	0.83%	1.08%	0.98%	1.23%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier Disciplined Growth Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	54	170	296	665
Class R5	64	202	351	786
Service Class	75	233	406	906
Administrative Class	85	265	460	1,025
Class A	679	899	1,136	1,816
Class R4	100	312	542	1,201
Class R3	125	390	676	1,489

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 153% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Under normal circumstances, the Fund invests substantially all (but no less than 80%) of its net assets in common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included within the Russell 1000 Growth Index (“Index”) (as of December 31, 2013, $1.27 billion to $504.48 billion). The Index is an unmanaged index that contains those stocks with a greater than average growth orientation among the stocks of the 1000 largest U.S. companies based on total market capitalization. The Fund may use futures contracts as a substitute for direct investments. Use of derivatives by the Fund may create investment leverage.

The Fund’s subadviser, Babson Capital Management LLC (“Babson Capital”), employs quantitative analysis to identify stocks included within the Index that it believes may have the potential to outperform the Index, using a proprietary model that ranks all stocks within the Index based on factors such as a company’s valuation, earnings quality, stock price momentum, and earnings improvement. Based on these rankings, Babson Capital seeks to construct a broadly diversified portfolio that it believes may have the potential to produce higher returns than the Index while maintaining risk characteristics similar to the Index. Babson Capital will typically adjust Index weights to: (1) overweight high-ranking stocks, (2) underweight low-ranking stocks (or not hold them at all), and (3) market weight stocks that do not have particularly high or low rankings. Babson Capital may also consider stocks not included in the Index but with similar market capitalizations. Babson Capital does not use market timing or macro economic forecasting in constructing the Fund’s portfolio.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performances.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Indexing Risk The Fund’s performance may not track the performance of the index exactly due to a number of factors, including fees and expenses of the Fund, and the Fund’s cash positions.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class R5, Administrative Class, and Class A shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class and Class A shares to reflect Administrative Class and Class A expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I, Class R4, and Class R3 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 and Class R3 shares to reflect Class R4 and Class R3 expenses, respectively. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Service Class Shares

Highest Quarter: 2Q  '09, 15.54% Lowest Quarter: 4Q  '08, -22.45%

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. After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Disciplined Growth Fund	One Year	Five Years	Ten Years
Service Class	35.51%	20.42%	7.91%
Service Class Return After Taxes on Distributions	26.95%	18.69%	6.99%
Service Class Return After Taxes on Distributions and Sale of Fund Shares	22.35%	16.21%	6.18%
Class I	35.72%	20.54%	7.95%
Class R5	35.72%	20.54%	7.95%
Administrative Class	35.38%	20.30%	7.76%
Class A	27.35%	18.56%	6.86%
Class R4	35.26%	20.12%	7.58%
Class R3	34.93%	19.83%	7.31%
Russell 1000 Growth Index (reflects no deduction for fees, expenses, or taxes)	33.48%	20.39%	7.83%

[1] Management Fees and Other Expenses have been restated to reflect current fees.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Registrant Name

dei_EntityRegistrantName

MASSMUTUAL PREMIER FUNDS

Prospectus Date

rr_ProspectusDate

Feb. 03, 2014

MassMutual Premier Disciplined Value Fund

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

MassMutual Premier Disciplined Value Fund

Objective [Heading]

rr_ObjectiveHeading

INVESTMENT OBJECTIVE

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

This Fund seeks to outperform the total return performance of its benchmark index, the Russell 1000^® Value Index*, while maintaining risk characteristics similar to those of the benchmark.

* Fund is not promoted, sponsored, or endorsed by, nor in any way affiliated with Russell Investment Group ("Russell"). Russell is not responsible for and has not reviewed the Fund nor any associated literature or publications and Russell makes no representation or warranty, express or implied, as to their accuracy, or completeness, or otherwise. The Russell 1000^® Value Index and Russell^® are trademarks of the Frank Russell Company.

Expense [Heading]

rr_ExpenseHeading

FEES AND EXPENSES OF THE FUND

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

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 145% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

145.00%

Expense Breakpoint Discounts [Text]

rr_ExpenseBreakpointDiscounts

For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds.

Expense Breakpoint, Minimum Investment Required [Amount]

rr_ExpenseBreakpointMinimumInvestmentRequiredAmount

$ 25,000

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Management Fees and Other Expenses have been restated to reflect current fees.

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

rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees

Because Total Annual Fund Operating Expenses include Acquired Fund fees and expenses, they may not correspond to the ratios of expenses to average daily net assets shown in the "Financial Highlights" tables in the Prospectus, which reflect the operating expenses of the Fund and do not include Acquired Fund fees and expenses.

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

rr_StrategyHeading

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Fund invests substantially all (but not less than 80%) of its net assets in common stocks of companies whose market capitalizations at the time of purchase are within the market capitalization range of companies included in the Russell 1000^® Value Index (“Index”) (as of December 31, 2013, $1.14 billion to $504.48 billion). The Index is a market capitalization-weighted index of those stocks of the 1,000 largest US-domiciled companies that exhibit value-oriented characteristics. The Fund may use futures contracts as a substitute for direct investments. Use of derivatives by the Fund may create investment leverage.

The Fund’s subadviser, Babson Capital Management LLC (“Babson Capital”), employs quantitative analysis to identify stocks included within the Index that it believes have the potential to outperform the Index over time, using a proprietary quantitative model that ranks all stocks included in the Index based on factors such as a company’s valuation, earnings quality, stock price momentum, and earnings improvement. Based on these rankings, Babson Capital seeks to construct a broadly diversified portfolio that it believes may have the potential to produce higher returns than the Index while maintaining risk characteristics similar to the Index. Babson Capital will typically adjust Index weights to: (1) overweight high-ranking stocks, (2) underweight low-ranking stocks (or not hold them at all), and (3) market weight stocks that do not have particularly high or low rankings. Babson Capital may also consider stocks not included in the Index but with similar market capitalizations. Babson Capital does not use market timing or macro-economic forecasting in constructing the Fund’s portfolio.

The Fund expects that it will engage in active and frequent trading and so will typically have a relatively high portfolio turnover rate.

Risk [Heading]

rr_RiskHeading

Principal Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Credit Risk The Fund is subject to the risk that the issuer of an investment held by the Fund or the counterparty to a transaction entered into by the Fund will be unable or unwilling to honor its obligations.

Derivatives Risk Derivatives involve risks different from, and potentially greater than, direct investments, including risks of imperfect correlation between the value of derivatives and underlying assets, counterparty default, potential losses that partially or completely offset gains, and illiquidity. Derivatives can create investment leverage and be highly volatile. Derivatives may result in losses greater than the amount invested. If the value of a derivative does not correlate well with the particular market or asset class the derivative is designed to provide exposure to, the derivative may not have the effect anticipated. Many derivatives are traded in the over-the-counter market and not on exchanges.

Frequent Trading/Portfolio Turnover Risk Portfolio turnover generally involves some expense to the Fund and may result in the realization of taxable capital gains (including short-term gains). The trading costs and tax effects associated with portfolio turnover may adversely affect the Fund’s performance.

Indexing Risk The Fund’s performance may not track the performance of the index exactly due to a number of factors, including fees and expenses of the Fund, and the Fund’s cash positions.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager’s ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund’s portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security’s intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Risk Lose Money [Text]

rr_RiskLoseMoney

You have the potential to make money by investing in the Fund, but you can also lose money.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Information

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance. Performance for Class R5, Administrative Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class, Class A, and Class R3 shares to reflect Administrative Class, Class A, and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The bar chart shows changes in the Fund’s performance from year to year for Service Class shares. The table shows how the Fund’s average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-888-309-3539

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

http://www.massmutual.com/funds

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

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

Annual Performance

Service Class Shares

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Highest
Quarter: 3Q  '09, 17.77% Lowest Quarter: 4Q  '08, -21.87%

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns
(For the periods ended December 31, 2013)

Performance Table Does Reflect Sales Loads

rr_PerformanceTableDoesReflectSalesLoads

Performance for Class R5, Administrative Class, Class A, and Class R3 shares of the Fund for periods prior to their inception date (11/01/04) is based on the performance of Service Class shares, adjusted for Administrative Class, Class A, and Class R3 shares to reflect Administrative Class, Class A, and Class R3 expenses, respectively, and for Class A shares to reflect any applicable sales charge.

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

After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

Performance Table Narrative

rr_PerformanceTableNarrativeTextBlock

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. After-tax returns 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 are shown for Service Class only. After-tax returns for other classes will vary.

MassMutual Premier Disciplined Value Fund | Class I

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.08%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.55%

^[2]

1 Year

rr_ExpenseExampleYear01

56

3 Years

rr_ExpenseExampleYear03

176

5 Years

rr_ExpenseExampleYear05

307

10 Years

rr_ExpenseExampleYear10

689

One Year

rr_AverageAnnualReturnYear01

33.45%

Five Years

rr_AverageAnnualReturnYear05

15.96%

Ten Years

rr_AverageAnnualReturnYear10

7.39%

MassMutual Premier Disciplined Value Fund | Class R5

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.18%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.65%

^[2]

1 Year

rr_ExpenseExampleYear01

66

3 Years

rr_ExpenseExampleYear03

208

5 Years

rr_ExpenseExampleYear05

362

10 Years

rr_ExpenseExampleYear10

810

One Year

rr_AverageAnnualReturnYear01

33.45%

Five Years

rr_AverageAnnualReturnYear05

15.96%

Ten Years

rr_AverageAnnualReturnYear10

7.39%

MassMutual Premier Disciplined Value Fund | Service Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.75%

^[2]

1 Year

rr_ExpenseExampleYear01

77

3 Years

rr_ExpenseExampleYear03

240

5 Years

rr_ExpenseExampleYear05

417

10 Years

rr_ExpenseExampleYear10

930

2004

rr_AnnualReturn2004

16.45%

2005

rr_AnnualReturn2005

8.02%

2006

rr_AnnualReturn2006

21.53%

2007

rr_AnnualReturn2007

(1.51%)

2008

rr_AnnualReturn2008

(36.00%)

2009

rr_AnnualReturn2009

16.93%

2010

rr_AnnualReturn2010

14.41%

2011

rr_AnnualReturn2011

0.52%

2012

rr_AnnualReturn2012

16.42%

2013

rr_AnnualReturn2013

33.33%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Highest Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

17.77%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Lowest Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(21.87%)

One Year

rr_AverageAnnualReturnYear01

33.33%

Five Years

rr_AverageAnnualReturnYear05

15.86%

Ten Years

rr_AverageAnnualReturnYear10

7.24%

MassMutual Premier Disciplined Value Fund | Administrative Class

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.38%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

0.85%

^[2]

1 Year

rr_ExpenseExampleYear01

87

3 Years

rr_ExpenseExampleYear03

271

5 Years

rr_ExpenseExampleYear05

471

10 Years

rr_ExpenseExampleYear10

1,049

One Year

rr_AverageAnnualReturnYear01

33.13%

Five Years

rr_AverageAnnualReturnYear05

15.73%

Ten Years

rr_AverageAnnualReturnYear10

7.09%

MassMutual Premier Disciplined Value Fund | Class A

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

5.75%

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.38%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.10%

^[2]

1 Year

rr_ExpenseExampleYear01

681

3 Years

rr_ExpenseExampleYear03

905

5 Years

rr_ExpenseExampleYear05

1,146

10 Years

rr_ExpenseExampleYear10

1,838

One Year

rr_AverageAnnualReturnYear01

25.13%

Five Years

rr_AverageAnnualReturnYear05

14.03%

Ten Years

rr_AverageAnnualReturnYear10

6.19%

MassMutual Premier Disciplined Value Fund | Class R4

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.00%

^[2]

1 Year

rr_ExpenseExampleYear01

102

3 Years

rr_ExpenseExampleYear03

318

5 Years

rr_ExpenseExampleYear05

552

10 Years

rr_ExpenseExampleYear10

1,225

One Year

rr_AverageAnnualReturnYear01

33.00%

Five Years

rr_AverageAnnualReturnYear05

15.56%

Ten Years

rr_AverageAnnualReturnYear10

7.01%

MassMutual Premier Disciplined Value Fund | Class R3

Risk/Return:

rr_RiskReturnAbstract

Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)

rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice

none

Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)

rr_MaximumDeferredSalesChargeOverOther

none

Management Fees

rr_ManagementFeesOverAssets

0.45%

^[1]

Distribution and Service (Rule 12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.50%

Other Expenses

rr_OtherExpensesOverAssets

0.28%

^[1]

Acquired Fund Fees and Expenses

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Fund Operating Expenses

rr_ExpensesOverAssets

1.25%

^[2]

1 Year

rr_ExpenseExampleYear01

127

3 Years

rr_ExpenseExampleYear03

397

5 Years

rr_ExpenseExampleYear05

686

10 Years

rr_ExpenseExampleYear10

$ 1,511

One Year

rr_AverageAnnualReturnYear01

32.44%

Five Years

rr_AverageAnnualReturnYear05

15.07%

Ten Years

rr_AverageAnnualReturnYear10

6.49%

MassMutual Premier Disciplined Value Fund | Return After Taxes on Distributions | Service Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.80%

Five Years

rr_AverageAnnualReturnYear05

15.49%

Ten Years

rr_AverageAnnualReturnYear10

6.50%

MassMutual Premier Disciplined Value Fund | Return After Taxes on Distributions and Sale of Fund Shares | Service Class

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

19.29%

Five Years

rr_AverageAnnualReturnYear05

12.86%

Ten Years

rr_AverageAnnualReturnYear10

5.80%

MassMutual Premier Disciplined Value Fund | Russell 1000 Value Index (reflects no deduction for fees, expenses, or taxes)

Risk/Return:

rr_RiskReturnAbstract

One Year

rr_AverageAnnualReturnYear01

32.53%

Five Years

rr_AverageAnnualReturnYear05

16.67%

Ten Years

rr_AverageAnnualReturnYear10

7.58%

[1] Management Fees and Other Expenses have been restated to reflect current fees.

[2] Because Total Annual Fund Operating Expenses include Acquired Fund fees and expenses, they may not correspond to the ratios of expenses to average daily net assets shown in the "Financial Highlights" tables in the Prospectus, which reflect the operating expenses of the Fund and do not include Acquired Fund fees and expenses.

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MassMutual Premier Main Street Fund

MassMutual Premier Main Street Fund

INVESTMENT OBJECTIVE

The Fund seeks a high total return.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. For Class A shares, you may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $25,000 in MassMutual funds. More information about these and other discounts is available in the section titled Sales Charges by Class on page 116 of the Fund’s Prospectus or from your financial professional.

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees MassMutual Premier Main Street Fund	Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Maximum Sales Charge (Load) Imposed on Purchases (as a % of offering price)	none	none	none	none	5.75%	none	none
Maximum Deferred Sales Charge (Load) (as a % of the lower of the original offering price or redemption proceeds)	none	none	none	none	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 MassMutual Premier Main Street Fund		Class I	Class R5	Service Class	Administrative Class	Class A	Class R4	Class R3
Management Fees	[1]	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%	0.55%
Distribution and Service (Rule 12b-1) Fees		none	none	none	none	0.25%	0.25%	0.50%
Other Expenses	[1]	0.09%	0.19%	0.29%	0.39%	0.39%	0.29%	0.29%
Total Annual Fund Operating Expenses		0.64%	0.74%	0.84%	0.94%	1.19%	1.09%	1.34%

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. It assumes that you invest $10,000 in each share class of the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. For Class A shares, the example includes the initial sales charge. The example also assumes that your investment earns a 5% return each year and that the Fund’s operating expenses are exactly as described in the preceding table. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example MassMutual Premier Main Street Fund (USD $)	1 Year	3 Years	5 Years	10 Years
Class I	65	205	357	798
Class R5	76	237	411	918
Service Class	86	268	466	1,037
Administrative Class	96	300	520	1,155
Class A	689	931	1,192	1,935
Class R4	111	347	601	1,329
Class R3	136	425	734	1,613

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 43% of the average value of its portfolio.

INVESTMENTS, RISKS, AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common stocks of U.S. companies of different capitalization ranges. The Fund’s subadviser, OFI Global Institutional, Inc. (“OFI Global”), currently focuses on “large capitalization” issuers, which are considered to be companies with market capitalizations at the time of purchase within the market capitalization range of companies included within the Russell 1000^® Index (as of December 31, 2013, $1.14 billion to $504.48 billion), although it may purchase stocks of companies with any market capitalization. The Fund typically invests most of its assets in equity securities of U.S. companies, but may invest in foreign securities. The Fund generally will not invest more than 15% of its total assets in foreign securities. The Fund may hold a portion of its assets in cash or cash equivalents.

OFI Global typically uses fundamental research and quantitative models to select securities for the Fund’s portfolio, which is comprised of both growth and value stocks. While the process may change over time or vary in particular cases, in general the selection process currently uses:

• a fundamental approach in analyzing issuers based on factors such as a company’s financial performance and prospects, industry position, and business model and management strength. OFI Global may also consider industry outlook, market trends and general economic conditions.

• quantitative models to rank securities within each sector to identify potential buy and sell candidates for further fundamental analysis. A number of company-specific factors are analyzed in constructing the models, including valuation, fundamentals and momentum.

The portfolio is constructed and regularly monitored based upon several analytical tools, including quantitative investment models.

The Fund aims to maintain a broadly diversified portfolio across all major economic sectors by applying investment parameters for both sector and position size. OFI Global may consider selling a security if, for example, in its judgment, a stock’s price is approaching its target, a company’s competitive position deteriorates, it believes that a company’s management is executing strategy poorly, or more attractive alternative investment ideas have been identified.

Principal Risks

The following are the Principal Risks of the Fund. You have the potential to make money by investing in the Fund, but you can also lose money.

Cash Position Risk The ability of the Fund to meet its objective may be limited to the extent that it holds assets in cash or otherwise uninvested.

Foreign Investment Risk; Emerging Markets Risk; Currency Risk Foreign securities are subject to additional risks compared to securities of U.S. issuers, including international trade, currency, political, regulatory, and diplomatic risks. In addition, fluctuations in currency exchange rates may adversely affect the values of foreign securities and the price of the Fund's shares. Emerging markets securities are subject to greater risks than securities issued in developed foreign markets, including less liquidity, greater price volatility, higher relative rates of inflation, greater political, economic, and social instability, greater custody and operational risks, and greater volatility in currency exchange rates.

Growth Company Risk The prices of growth securities are often more sensitive to market fluctuations because of their heavy dependence on future earnings expectations, and can be more volatile than the market in general.

Liquidity Risk Certain securities may be difficult (or impossible) to sell or positions difficult to close out at a desirable time and price, and the Fund may be required to hold an investment that is declining in value or be prevented from realizing capital gains.

Management Risk The Fund relies on the manager's ability to achieve its investment objective. There can be no assurance that the Fund will achieve the desired results and the Fund may incur significant losses.

Market Risk The value of the Fund's portfolio securities may decline, at times sharply and unpredictably, as a result of unfavorable market-induced changes affecting particular industries, sectors, or issuers. Stock market prices in general may decline over short or extended periods, subjecting the Fund to unpredictable declines in the value of its shares and poor performance. The Fund is subject to risks affecting issuers, such as management performance, financial leverage, industry problems, and reduced demand for goods or services.

Smaller and Mid-Cap Company Risk Market risk and liquidity risk are particularly pronounced for securities of smaller companies, which may trade less frequently and in smaller volumes than more widely-held securities, and may fluctuate in price more than other securities. Smaller companies may have limited product lines, markets, or financial resources and may be dependent on a limited management group; they may have been recently organized and have little or no track record of success.

Valuation Risk The Fund is subject to the risk of mispricing or improper valuation of its investments, in particular to the extent that its securities are fair valued.

Value Company Risk The value investment approach entails the risk that the market will not recognize a security's intrinsic value for a long time, or that a stock judged to be undervalued may actually be appropriately priced.

Performance Information

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year for Class R5 shares. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception, compare with those of a broad measure of market performance. Performance for Class I and Class R4 shares of the Fund for periods prior to their inception date (04/01/14) is based on the performance of Class R5 shares, adjusted for Class R4 shares to reflect Class R4 expenses. Performance for Class A shares of the Fund reflects any applicable sales charge. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. More up-to-date performance information is available at http://www.massmutual.com/funds or by calling 1-888-309-3539.

Annual Performance

Class R5 Shares

Highest Quarter: 2Q  '09, 18.61% Lowest Quarter: 4Q  '08, -22.19%

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. After-tax returns 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 are shown for Class R5 only. After-tax returns for other classes will vary.

Average Annual Total Returns
(For the periods ended December 31, 2013)

Average Annual Total Returns MassMutual Premier Main Street Fund	One Year	Five Years	Since Inception	Inception Date
Class R5	31.77%	18.12%	6.72%	Dec. 31, 2004
Class R5 Return After Taxes on Distributions	31.50%	17.92%	6.03%	Dec. 31, 2004
Class R5 Return After Taxes on Distributions and Sale of Fund Shares	18.20%	14.77%	5.32%	Dec. 31, 2004
Class I	31.77%	18.12%	6.72%	Dec. 31, 2004
Service Class	31.67%	18.11%	6.61%	Dec. 31, 2004
Administrative Class	31.52%	17.91%	6.48%	Dec. 31, 2004
Class A	23.72%	16.22%	5.51%	Dec. 31, 2004
Class R4	31.32%	17.71%	6.29%	Dec. 31, 2004
Class R3	30.81%	17.24%	5.88%	Dec. 31, 2004
S&P 500 Index (reflects no deduction for fees, expenses, or taxes)	32.39%	17.94%	7.01%	Dec. 31, 2004

[1] Management Fees and Other Expenses have been restated to reflect current fees.

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Registrant Name	dei_EntityRegistrantName	MASSMUTUAL PREMIER FUNDS
Prospectus Date	rr_ProspectusDate	Feb. 03, 2014
Document Creation Date	dei_DocumentCreationDate	Apr. 01, 2014