Shareholder Report
|
6 Months Ended |
|
Jun. 30, 2025
USD ($)
$ / shares
|
|---|
| Shareholder Report [Line Items] |
|
|
| Document Type |
N-CSRS
|
|
| Amendment Flag |
false
|
|
| Registrant Name |
MML
Series Investment Fund II
|
|
| Entity Central Index Key |
0001317146
|
|
| Entity Investment Company Type |
N-1A
|
|
| Document Period End Date |
Jun. 30, 2025
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Blend Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Blend Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Initial Class
|
$23
|
0.45%*
|
|
[1] |
| Expenses Paid, Amount |
$ 23
|
|
| Expense Ratio, Percent |
0.45%
|
[1] |
| Net Assets |
$ 682,300,000
|
|
| Holdings Count | $ / shares |
10
|
|
| Investment Company Portfolio Turnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$682.3
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
10
|
|
Portfolio Turnover Rate
|
3%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
59.8%
|
|
Fixed Income Funds
|
38.8%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Blend Fund
|
|
| Class Name |
Service Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Blend Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class
|
$36
|
0.70%*
|
|
[2] |
| Expenses Paid, Amount |
$ 36
|
|
| Expense Ratio, Percent |
0.70%
|
[2] |
| Net Assets |
$ 682,300,000
|
|
| Holdings Count | $ / shares |
10
|
|
| Investment Company Portfolio Turnover |
3.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$682.3
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
10
|
|
Portfolio Turnover Rate
|
3%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
59.8%
|
|
Fixed Income Funds
|
38.8%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Equity Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Equity Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Initial Class
|
$22
|
0.43%*
|
|
[3] |
| Expenses Paid, Amount |
$ 22
|
|
| Expense Ratio, Percent |
0.43%
|
[3] |
| Net Assets |
$ 852,400,000
|
|
| Holdings Count | $ / shares |
223
|
|
| Investment Company Portfolio Turnover |
37.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$852.4
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
223
|
|
Portfolio Turnover Rate
|
37%
|
|
|
| Holdings [Text Block] |
|
|
|
Largest Holdings
(% of Total Investments)
|
|
|
JP Morgan Chase & Co.
|
5.5%
|
|
Johnson & Johnson
|
3.7%
|
|
Bank of America Corp.
|
2.8%
|
|
Cisco Systems, Inc.
|
2.6%
|
|
Wells Fargo & Co.
|
2.3%
|
|
Walt Disney Co.
|
2.3%
|
|
Morgan Stanley
|
2.1%
|
|
Goldman Sachs Group, Inc.
|
2.1%
|
|
Chevron Corp.
|
2.0%
|
|
Caterpillar, Inc.
|
2.0%
|
|
|
|
Sectors
(% of Total Investments)
|
|
|
Financials
|
32.4%
|
|
Health Care
|
15.1%
|
|
Industrials
|
11.9%
|
|
Communication Services
|
8.6%
|
|
Consumer Discretionary
|
6.2%
|
|
Consumer Staples
|
6.0%
|
|
Information Technology
|
6.0%
|
|
Energy
|
5.4%
|
|
Materials
|
3.7%
|
|
Utilities
|
3.4%
|
|
Equity Funds
|
0.7%
|
|
Real Estate
|
0.1%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Equity Fund
|
|
| Class Name |
Service Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Equity Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class
|
$35
|
0.68%*
|
|
[4] |
| Expenses Paid, Amount |
$ 35
|
|
| Expense Ratio, Percent |
0.68%
|
[4] |
| Net Assets |
$ 852,400,000
|
|
| Holdings Count | $ / shares |
223
|
|
| Investment Company Portfolio Turnover |
37.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$852.4
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
223
|
|
Portfolio Turnover Rate
|
37%
|
|
|
| Holdings [Text Block] |
|
|
|
Largest Holdings
(% of Total Investments)
|
|
|
JP Morgan Chase & Co.
|
5.5%
|
|
Johnson & Johnson
|
3.7%
|
|
Bank of America Corp.
|
2.8%
|
|
Cisco Systems, Inc.
|
2.6%
|
|
Wells Fargo & Co.
|
2.3%
|
|
Walt Disney Co.
|
2.3%
|
|
Morgan Stanley
|
2.1%
|
|
Goldman Sachs Group, Inc.
|
2.1%
|
|
Chevron Corp.
|
2.0%
|
|
Caterpillar, Inc.
|
2.0%
|
|
|
|
Sectors
(% of Total Investments)
|
|
|
Financials
|
32.4%
|
|
Health Care
|
15.1%
|
|
Industrials
|
11.9%
|
|
Communication Services
|
8.6%
|
|
Consumer Discretionary
|
6.2%
|
|
Consumer Staples
|
6.0%
|
|
Information Technology
|
6.0%
|
|
Energy
|
5.4%
|
|
Materials
|
3.7%
|
|
Utilities
|
3.4%
|
|
Equity Funds
|
0.7%
|
|
Real Estate
|
0.1%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Inflation-Protected and Income Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Inflation-Protected and Income Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Initial Class
|
$31
|
0.62%*
|
|
[5] |
| Expenses Paid, Amount |
$ 31
|
|
| Expense Ratio, Percent |
0.62%
|
[5] |
| Net Assets |
$ 166,700,000
|
|
| Holdings Count | $ / shares |
176
|
|
| Investment Company Portfolio Turnover |
44.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$166.7
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
176
|
|
Portfolio Turnover Rate
|
44%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Non-U.S. Government Agency Obligations
|
62.5%
|
|
U.S. Treasury Obligations
|
22.0%
|
|
Commercial Paper
|
11.1%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
3.1%
|
|
Repurchase Agreement
|
1.3%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Inflation-Protected and Income Fund
|
|
| Class Name |
Service Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Inflation-Protected and Income Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class
|
$44
|
0.87%*
|
|
[6] |
| Expenses Paid, Amount |
$ 44
|
|
| Expense Ratio, Percent |
0.87%
|
[6] |
| Net Assets |
$ 166,700,000
|
|
| Holdings Count | $ / shares |
176
|
|
| Investment Company Portfolio Turnover |
44.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$166.7
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
176
|
|
Portfolio Turnover Rate
|
44%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Non-U.S. Government Agency Obligations
|
62.5%
|
|
U.S. Treasury Obligations
|
22.0%
|
|
Commercial Paper
|
11.1%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
3.1%
|
|
Repurchase Agreement
|
1.3%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Class II |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML iShares® 60/40 Allocation Fund
|
|
| Class Name |
Class II
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML iShares® 60/40 Allocation Fund* (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Class II
|
$24
|
0.46%*
|
|
[7] |
| Expenses Paid, Amount |
$ 24
|
|
| Expense Ratio, Percent |
0.46%
|
[7] |
| Net Assets |
$ 63,200,000
|
|
| Holdings Count | $ / shares |
11
|
|
| Investment Company Portfolio Turnover |
5.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$63.2
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
11
|
|
Portfolio Turnover Rate
|
5%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
60.0%
|
|
Fixed Income Funds
|
40.0%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class I |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML iShares® 60/40 Allocation Fund
|
|
| Class Name |
Service Class I
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML iShares® 60/40 Allocation Fund* (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class I
|
$36
|
0.71%*
|
|
[8] |
| Expenses Paid, Amount |
$ 36
|
|
| Expense Ratio, Percent |
0.71%
|
[8] |
| Net Assets |
$ 63,200,000
|
|
| Holdings Count | $ / shares |
11
|
|
| Investment Company Portfolio Turnover |
5.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$63.2
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
11
|
|
Portfolio Turnover Rate
|
5%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
60.0%
|
|
Fixed Income Funds
|
40.0%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Class II |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML iShares® 80/20 Allocation Fund
|
|
| Class Name |
Class II
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML iShares® 80/20 Allocation Fund* (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Class II
|
$24
|
0.46%*
|
|
[9] |
| Expenses Paid, Amount |
$ 24
|
|
| Expense Ratio, Percent |
0.46%
|
[9] |
| Net Assets |
$ 117,500,000
|
|
| Holdings Count | $ / shares |
13
|
|
| Investment Company Portfolio Turnover |
4.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$117.5
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
13
|
|
Portfolio Turnover Rate
|
4%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
79.0%
|
|
Fixed Income Funds
|
19.7%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class I |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML iShares® 80/20 Allocation Fund
|
|
| Class Name |
Service Class I
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML iShares® 80/20 Allocation Fund* (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class I
|
$37
|
0.71%*
|
|
[10] |
| Expenses Paid, Amount |
$ 37
|
|
| Expense Ratio, Percent |
0.71%
|
[10] |
| Net Assets |
$ 117,500,000
|
|
| Holdings Count | $ / shares |
13
|
|
| Investment Company Portfolio Turnover |
4.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$117.5
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
13
|
|
Portfolio Turnover Rate
|
4%
|
|
|
| Holdings [Text Block] |
|
|
|
Sectors
(% of Total Investments)
|
|
|
Equity Funds
|
79.0%
|
|
Fixed Income Funds
|
19.7%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Managed Bond Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Managed Bond Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Initial Class
|
$23
|
0.45%*
|
|
[11] |
| Expenses Paid, Amount |
$ 23
|
|
| Expense Ratio, Percent |
0.45%
|
[11] |
| Net Assets |
$ 734,200,000
|
|
| Holdings Count | $ / shares |
393
|
|
| Investment Company Portfolio Turnover |
88.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$734.2
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
393
|
|
Portfolio Turnover Rate
|
88%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Corporate Debt
|
38.2%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
27.3%
|
|
Non-U.S. Government Agency Obligations
|
19.2%
|
|
U.S. Treasury Obligations
|
13.6%
|
|
Investment of Cash Collateral from Securities Loaned
|
0.8%
|
|
Commercial Paper
|
0.8%
|
|
Sovereign Debt Obligations
|
0.2%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Managed Bond Fund
|
|
| Class Name |
Service Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Managed Bond Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class
|
$35
|
0.70%*
|
|
[12] |
| Expenses Paid, Amount |
$ 35
|
|
| Expense Ratio, Percent |
0.70%
|
[12] |
| Net Assets |
$ 734,200,000
|
|
| Holdings Count | $ / shares |
393
|
|
| Investment Company Portfolio Turnover |
88.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$734.2
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
393
|
|
Portfolio Turnover Rate
|
88%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Corporate Debt
|
38.2%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
27.3%
|
|
Non-U.S. Government Agency Obligations
|
19.2%
|
|
U.S. Treasury Obligations
|
13.6%
|
|
Investment of Cash Collateral from Securities Loaned
|
0.8%
|
|
Commercial Paper
|
0.8%
|
|
Sovereign Debt Obligations
|
0.2%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Class II |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Short-Duration Bond Fund
|
|
| Class Name |
Class II
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Short-Duration Bond Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Class II
|
$30
|
0.59%*
|
|
[13] |
| Expenses Paid, Amount |
$ 30
|
|
| Expense Ratio, Percent |
0.59%
|
[13] |
| Net Assets |
$ 110,900,000
|
|
| Holdings Count | $ / shares |
265
|
|
| Investment Company Portfolio Turnover |
23.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$110.9
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
265
|
|
Portfolio Turnover Rate
|
23%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Corporate Debt
|
44.6%
|
|
Non-U.S. Government Agency Obligations
|
34.6%
|
|
Commercial Paper
|
18.9%
|
|
Repurchase Agreement
|
1.3%
|
|
Investment of Cash Collateral from Securities Loaned
|
0.5%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
0.0%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class I |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Short-Duration Bond Fund
|
|
| Class Name |
Service Class I
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Short-Duration Bond Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class I
|
$42
|
0.84%*
|
|
[14] |
| Expenses Paid, Amount |
$ 42
|
|
| Expense Ratio, Percent |
0.84%
|
[14] |
| Net Assets |
$ 110,900,000
|
|
| Holdings Count | $ / shares |
265
|
|
| Investment Company Portfolio Turnover |
23.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$110.9
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
265
|
|
Portfolio Turnover Rate
|
23%
|
|
|
| Holdings [Text Block] |
|
|
|
Portfolio Characteristics
(% of Total Investments)
|
|
|
Corporate Debt
|
44.6%
|
|
Non-U.S. Government Agency Obligations
|
34.6%
|
|
Commercial Paper
|
18.9%
|
|
Repurchase Agreement
|
1.3%
|
|
Investment of Cash Collateral from Securities Loaned
|
0.5%
|
|
U.S. Government Agency Obligations and Instrumentalities
|
0.0%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Small Cap Equity Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Small Cap Equity Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Initial Class
|
$35
|
0.71%*
|
|
[15] |
| Expenses Paid, Amount |
$ 35
|
|
| Expense Ratio, Percent |
0.71%
|
[15] |
| Net Assets |
$ 123,900,000
|
|
| Holdings Count | $ / shares |
98
|
|
| Investment Company Portfolio Turnover |
18.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$123.9
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
98
|
|
Portfolio Turnover Rate
|
18%
|
|
|
| Holdings [Text Block] |
|
|
|
Largest Holdings
(% of Total Investments)
|
|
|
AutoNation, Inc.
|
2.2%
|
|
Itron, Inc.
|
2.1%
|
|
Wintrust Financial Corp.
|
1.9%
|
|
Casella Waste Systems, Inc. Class A
|
1.8%
|
|
Zurn Elkay Water Solutions Corp.
|
1.7%
|
|
Belden, Inc.
|
1.6%
|
|
Enpro, Inc.
|
1.6%
|
|
Esab Corp.
|
1.6%
|
|
PennyMac Financial Services, Inc.
|
1.6%
|
|
American Healthcare REIT, Inc.
|
1.5%
|
|
|
|
Sectors
(% of Total Investments)
|
|
|
Industrials
|
21.0%
|
|
Financials
|
19.2%
|
|
Health Care
|
14.9%
|
|
Information Technology
|
13.5%
|
|
Consumer Discretionary
|
11.5%
|
|
Real Estate
|
5.6%
|
|
Energy
|
4.0%
|
|
Materials
|
3.7%
|
|
Utilities
|
2.3%
|
|
Consumer Staples
|
1.9%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Service Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML Small Cap Equity Fund
|
|
| Class Name |
Service Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML Small Cap Equity Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
|
|
|
|
Class Name
|
Costs of a $10,000 investment
|
Costs paid as a percentage of a $10,000 investment
|
|
Service Class
|
$48
|
0.96%*
|
|
[16] |
| Expenses Paid, Amount |
$ 48
|
|
| Expense Ratio, Percent |
0.96%
|
[16] |
| Net Assets |
$ 123,900,000
|
|
| Holdings Count | $ / shares |
98
|
|
| Investment Company Portfolio Turnover |
18.00%
|
|
| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
|
|
|
Total Net Assets (Millions)
|
$123.9
|
|
Total Number of Portfolio Holdings (includes derivative positions, if any)
|
98
|
|
Portfolio Turnover Rate
|
18%
|
|
|
| Holdings [Text Block] |
|
|
|
Largest Holdings
(% of Total Investments)
|
|
|
AutoNation, Inc.
|
2.2%
|
|
Itron, Inc.
|
2.1%
|
|
Wintrust Financial Corp.
|
1.9%
|
|
Casella Waste Systems, Inc. Class A
|
1.8%
|
|
Zurn Elkay Water Solutions Corp.
|
1.7%
|
|
Belden, Inc.
|
1.6%
|
|
Enpro, Inc.
|
1.6%
|
|
Esab Corp.
|
1.6%
|
|
PennyMac Financial Services, Inc.
|
1.6%
|
|
American Healthcare REIT, Inc.
|
1.5%
|
|
|
|
Sectors
(% of Total Investments)
|
|
|
Industrials
|
21.0%
|
|
Financials
|
19.2%
|
|
Health Care
|
14.9%
|
|
Information Technology
|
13.5%
|
|
Consumer Discretionary
|
11.5%
|
|
Real Estate
|
5.6%
|
|
Energy
|
4.0%
|
|
Materials
|
3.7%
|
|
Utilities
|
2.3%
|
|
Consumer Staples
|
1.9%
|
|
|
| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
|
|
| Initial Class |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
MML U.S. Government Money Market Fund
|
|
| Class Name |
Initial Class
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the MML U.S. Government Money Market Fund (the “Fund”) for the period of January 1, 2025 to June 30, 2025.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at https://www.massmutual.com/product-performance/variable-insurance-funds. You can also request this information by contacting us at 1-888-309-3539 or by sending an email request to fundinfo@massmutual.com.
|
|
| Additional Information Phone Number |
1-888-309-3539
|
|
| Additional Information Email |
fundinfo@massmutual.com
|
|
| Additional Information Website |
https://www.massmutual.com/product-performance/variable-insurance-funds
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| Expenses [Text Block] |
WHAT WERE THE FUND COSTS FOR THE LAST SIX MONTHS? This example shows the expenses you would have paid over the past six months, based on a hypothetical $10,000 investment. This table reflects any applicable waivers or expense limitations.
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Class Name
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Costs of a $10,000 investment
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Costs paid as a percentage of a $10,000 investment
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Initial Class
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$26
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0.52%*
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[17] |
| Expenses Paid, Amount |
$ 26
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| Expense Ratio, Percent |
0.52%
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[17] |
| Net Assets |
$ 194,000,000.0
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| Holdings Count | $ / shares |
22
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| Additional Fund Statistics [Text Block] |
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
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Total Net Assets (Millions)
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$194.0
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Total Number of Portfolio Holdings (includes derivative positions, if any)
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22
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| Holdings [Text Block] |
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Portfolio Characteristics
(% of Total Investments)
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U.S. Treasury Bills
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48.7%
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Discount Notes
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38.2%
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Repurchase Agreement
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13.1%
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| Updated Prospectus Web Address |
https://www.massmutual.com/product-performance/variable-insurance-funds
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