XML 9 R2.htm IDEA: XBRL DOCUMENT v3.25.2
Fees and Expenses - MassMutual Core Bond Fund
Sep. 30, 2025
Prospectus [Line Items]  
Expense Heading [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Expenses Restated to Reflect Current [Text] Management Fees have been restated to reflect current fees.
Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Class I
 
 
Class R5
 
 
Service
Class 
 
 
Administrative
Class
 
 
Class R4
 
 
Class A
 
 
Class R3
 
 
Class Y
Management Fees(1)
 
 
0.30%
 
 
0.30%
 
 
0.30%
 
 
0.30%
 
 
0.30%
 
 
0.30%
 
 
0.30%
 
 
0.30%
Distribution and Service (Rule 12b-1) Fees
 
 
None
 
 
None
 
 
None
 
 
None
 
 
0.25%
 
 
0.25%
 
 
0.50%
 
 
None
Other Expenses
 
 
0.07%
 
 
0.17%
 
 
0.27%
 
 
0.37%
 
 
0.27%
 
 
0.32%
 
 
0.27%
 
 
0.17%
Total Annual Fund Operating Expenses
 
 
0.37%
 
 
0.47%
 
 
0.57%
 
 
0.67%
 
 
0.82%
 
 
0.87%
 
 
1.07%
 
 
0.47%
Expense Reimbursement
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
 
 
(0.04%)
Total Annual Fund Operating Expenses after Expense Reimbursement(2)
 
 
0.33%
 
 
0.43%
 
 
0.53%
 
 
0.63%
 
 
0.78%
 
 
0.83%
 
 
1.03%
 
 
0.43%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
Management Fees 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 legal and other expenses, Acquired Fund Fees and Expenses, interest expense, expenses related to borrowings, securities lending, leverage, taxes, and brokerage, short sale dividend and loan expense, or other non-recurring or unusual expenses such as organizational expenses and shareholder meeting expenses, as applicable) through January 31, 2027, to the extent that Total Annual Fund Operating Expenses after Expense Reimbursement would otherwise exceed 0.33%, 0.43%, 0.53%, 0.63%, 0.78%, 0.83%, 1.03%, and 0.43% for Classes I, R5, Service, Administrative, R4, A, R3, and Y, 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.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]
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 front-end 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, With Redemption [Table]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1 Year
 
 
3 Years
 
 
5 Years
 
 
10 Years
Class I
 
 
$34
 
 
$113
 
 
$ 202
 
 
$462
Class R5
 
 
$44
 
 
$145
 
 
$ 257
 
 
$586
Service Class
 
 
$54
 
 
$177
 
 
$ 313
 
 
$708
Administrative Class
 
 
$64
 
 
$209
 
 
$ 368
 
 
$829
Class R4
 
 
$80
 
 
$256
 
 
$ 449
 
 
$1,008
Class A
 
 
$506
 
 
$685
 
 
$ 881
 
 
$1,447
Class R3
 
 
$105
 
 
$335
 
 
$ 585
 
 
$1,300
Class Y
 
 
$44
 
 
$145
 
 
$ 257
 
 
$586