v3.25.2
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
Entity Central Index Key 0000067160
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Conservative Allocation 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 Conservative 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
Initial Class
$7
0.14%*
[1]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14% [1]
Net Assets $ 227,700,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$227.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
19%
Holdings [Text Block]
Sectors
(% of Total Investments)
Fixed Income Funds
59.4%
Equity Funds
40.6%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Conservative Allocation 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 Conservative 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
$20
0.39%*
[2]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.39% [2]
Net Assets $ 227,700,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$227.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
19%
Holdings [Text Block]
Sectors
(% of Total Investments)
Fixed Income Funds
59.4%
Equity Funds
40.6%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Balanced Allocation 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 Balanced 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
Initial Class
$7
0.13%*
[3]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13% [3]
Net Assets $ 282,000,000.0
Holdings Count | $ / shares 22
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)
$282.0
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
18%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
50.6%
Fixed Income Funds
49.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Balanced Allocation 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 Balanced 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
$19
0.38%*
[4]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38% [4]
Net Assets $ 282,000,000.0
Holdings Count | $ / shares 22
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)
$282.0
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
18%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
50.6%
Fixed Income Funds
49.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Moderate Allocation 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 Moderate 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
Initial Class
$6
0.12%*
[5]
Expenses Paid, Amount $ 6
Expense Ratio, Percent 0.12% [5]
Net Assets $ 956,200,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$956.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
16%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
60.6%
Fixed Income Funds
39.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Moderate Allocation 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 Moderate 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
$19
0.37%*
[6]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.37% [6]
Net Assets $ 956,200,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$956.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
16%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
60.6%
Fixed Income Funds
39.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Growth Allocation 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 Growth 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
Initial Class
$6
0.12%*
[7]
Expenses Paid, Amount $ 6
Expense Ratio, Percent 0.12% [7]
Net Assets $ 901,800,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 15.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$901.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
15%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
75.4%
Fixed Income Funds
24.6%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Growth Allocation 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 Growth 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
$19
0.37%*
[8]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.37% [8]
Net Assets $ 901,800,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 15.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$901.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
15%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
75.4%
Fixed Income Funds
24.6%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Aggressive Allocation 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 Aggressive 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
Initial Class
$8
0.16%*
[9]
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.16% [9]
Net Assets $ 124,300,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$124.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
14%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
90.3%
Fixed Income Funds
9.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Aggressive Allocation 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 Aggressive 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
$21
0.41%*
[10]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.41% [10]
Net Assets $ 124,300,000
Holdings Count | $ / shares 22
Investment Company Portfolio Turnover 14.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$124.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
22
Portfolio Turnover Rate
14%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
90.3%
Fixed Income Funds
9.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML American Funds Growth 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 American Funds Growth 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 investment1
Costs paid as a percentage of a $10,000 investment1
Service Class I
$53
1.02%*
[11],[12]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.02% [11],[12]
Net Assets $ 311,600,000
Holdings Count | $ / shares 1
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$311.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
1
Portfolio Turnover Rate
7%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
100.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML American Funds Core 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 American Funds Core 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
0.73%*
[13]
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.73% [13]
Net Assets $ 568,100,000
Holdings Count | $ / shares 4
Investment Company Portfolio Turnover 9.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$568.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
4
Portfolio Turnover Rate
9%
Holdings [Text Block]
Sectors
(% of Total Investments)
Equity Funds
65.5%
Fixed Income Funds
34.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Blue Chip Growth 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 Blue Chip Growth 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
$40
0.78%*
[14]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.78% [14]
Net Assets $ 490,600,000
Holdings Count | $ / shares 67
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$490.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
67
Portfolio Turnover Rate
10%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
14.0%
Microsoft Corp.
13.8%
Apple, Inc.
7.8%
Amazon.com, Inc.
7.1%
Meta Platforms, Inc. Class A
6.7%
Alphabet, Inc. Class C
3.6%
Visa, Inc. Class A
3.2%
Carvana Co.
3.1%
Broadcom, Inc.
3.1%
Netflix, Inc.
2.9%
Sectors
(% of Total Investments)
Information Technology
46.8%
Communication Services
15.7%
Consumer Discretionary
15.7%
Financials
8.7%
Health Care
6.8%
Industrials
3.1%
Utilities
0.9%
Consumer Staples
0.8%
Materials
0.7%
Retail
0.2%
Energy
0.2%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Blue Chip Growth 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 Blue Chip Growth 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
$53
1.03%*
[15]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.03% [15]
Net Assets $ 490,600,000
Holdings Count | $ / shares 67
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$490.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
67
Portfolio Turnover Rate
10%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
14.0%
Microsoft Corp.
13.8%
Apple, Inc.
7.8%
Amazon.com, Inc.
7.1%
Meta Platforms, Inc. Class A
6.7%
Alphabet, Inc. Class C
3.6%
Visa, Inc. Class A
3.2%
Carvana Co.
3.1%
Broadcom, Inc.
3.1%
Netflix, Inc.
2.9%
Sectors
(% of Total Investments)
Information Technology
46.8%
Communication Services
15.7%
Consumer Discretionary
15.7%
Financials
8.7%
Health Care
6.8%
Industrials
3.1%
Utilities
0.9%
Consumer Staples
0.8%
Materials
0.7%
Retail
0.2%
Energy
0.2%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Equity 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 Equity 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
$40
0.79%*
[16]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.79% [16]
Net Assets $ 466,400,000
Holdings Count | $ / shares 124
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)
$466.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
124
Portfolio Turnover Rate
23%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
MetLife, Inc.
2.1%
Southern Co.
2.0%
QUALCOMM, Inc.
2.0%
Charles Schwab Corp.
1.9%
JPMorgan Chase & Co.
1.9%
Wells Fargo & Co.
1.9%
Elevance Health, Inc.
1.8%
L3Harris Technologies, Inc.
1.7%
Citigroup, Inc.
1.7%
Kimberly-Clark Corp.
1.7%
Sectors
(% of Total Investments)
Financials
22.7%
Industrials
13.5%
Health Care
12.8%
Information Technology
9.1%
Consumer Staples
8.8%
Energy
8.7%
Utilities
5.9%
Communication Services
5.8%
Consumer Discretionary
4.4%
Real Estate
3.7%
Materials
3.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Equity 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 Equity 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
$53
1.04%*
[17]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.04% [17]
Net Assets $ 466,400,000
Holdings Count | $ / shares 124
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)
$466.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
124
Portfolio Turnover Rate
23%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
MetLife, Inc.
2.1%
Southern Co.
2.0%
QUALCOMM, Inc.
2.0%
Charles Schwab Corp.
1.9%
JPMorgan Chase & Co.
1.9%
Wells Fargo & Co.
1.9%
Elevance Health, Inc.
1.8%
L3Harris Technologies, Inc.
1.7%
Citigroup, Inc.
1.7%
Kimberly-Clark Corp.
1.7%
Sectors
(% of Total Investments)
Financials
22.7%
Industrials
13.5%
Health Care
12.8%
Information Technology
9.1%
Consumer Staples
8.8%
Energy
8.7%
Utilities
5.9%
Communication Services
5.8%
Consumer Discretionary
4.4%
Real Estate
3.7%
Materials
3.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class I  
Shareholder Report [Line Items]  
Fund Name MML Equity Index Fund
Class Name 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 Equity Index 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 I
$22
0.43%*
[18]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.43% [18]
Net Assets $ 640,500,000
Holdings Count | $ / shares 508
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$640.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
508
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.3%
Microsoft Corp.
7.0%
Apple, Inc.
5.8%
Amazon.com, Inc.
3.9%
Meta Platforms, Inc. Class A
3.0%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
1.9%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
32.9%
Financials
13.9%
Consumer Discretionary
10.3%
Communication Services
9.7%
Health Care
9.3%
Industrials
8.5%
Consumer Staples
5.5%
Energy
2.9%
Utilities
2.4%
Real Estate
2.0%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Equity Index 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 Equity Index 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
$14
0.28%*
[19]
Expenses Paid, Amount $ 14
Expense Ratio, Percent 0.28% [19]
Net Assets $ 640,500,000
Holdings Count | $ / shares 508
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$640.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
508
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.3%
Microsoft Corp.
7.0%
Apple, Inc.
5.8%
Amazon.com, Inc.
3.9%
Meta Platforms, Inc. Class A
3.0%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
1.9%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
32.9%
Financials
13.9%
Consumer Discretionary
10.3%
Communication Services
9.7%
Health Care
9.3%
Industrials
8.5%
Consumer Staples
5.5%
Energy
2.9%
Utilities
2.4%
Real Estate
2.0%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class III  
Shareholder Report [Line Items]  
Fund Name MML Equity Index Fund
Class Name Class III
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML Equity Index 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 III
$7
0.13%*
[20]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13% [20]
Net Assets $ 640,500,000
Holdings Count | $ / shares 508
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$640.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
508
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.3%
Microsoft Corp.
7.0%
Apple, Inc.
5.8%
Amazon.com, Inc.
3.9%
Meta Platforms, Inc. Class A
3.0%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
1.9%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
32.9%
Financials
13.9%
Consumer Discretionary
10.3%
Communication Services
9.7%
Health Care
9.3%
Industrials
8.5%
Consumer Staples
5.5%
Energy
2.9%
Utilities
2.4%
Real Estate
2.0%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Equity Index 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 Equity Index 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
$35
0.68%*
[21]
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.68% [21]
Net Assets $ 640,500,000
Holdings Count | $ / shares 508
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$640.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
508
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.3%
Microsoft Corp.
7.0%
Apple, Inc.
5.8%
Amazon.com, Inc.
3.9%
Meta Platforms, Inc. Class A
3.0%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
1.9%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
32.9%
Financials
13.9%
Consumer Discretionary
10.3%
Communication Services
9.7%
Health Care
9.3%
Industrials
8.5%
Consumer Staples
5.5%
Energy
2.9%
Utilities
2.4%
Real Estate
2.0%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Focused Equity 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 Focused 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
Class II
$45
0.89%*
[22]
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89% [22]
Net Assets $ 244,200,000
Holdings Count | $ / shares 26
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$244.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
26
Portfolio Turnover Rate
24%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Broadcom, Inc.
5.3%
Intuit, Inc.
5.2%
TJX Cos., Inc.
5.0%
Microsoft Corp.
5.0%
Linde PLC
4.8%
Texas Instruments, Inc.
4.8%
McDonald’s Corp.
4.6%
Mastercard, Inc. Class A
4.6%
Marsh & McLennan Cos., Inc.
4.5%
Coca-Cola Co.
4.5%
Sectors
(% of Total Investments)
Information Technology
27.1%
Financials
25.1%
Health Care
12.2%
Consumer Discretionary
9.6%
Industrials
9.0%
Consumer Staples
8.4%
Materials
4.8%
Communication Services
2.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Focused Equity 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 Focused 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 I
$58
1.14%*
[23]
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.14% [23]
Net Assets $ 244,200,000
Holdings Count | $ / shares 26
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$244.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
26
Portfolio Turnover Rate
24%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Broadcom, Inc.
5.3%
Intuit, Inc.
5.2%
TJX Cos., Inc.
5.0%
Microsoft Corp.
5.0%
Linde PLC
4.8%
Texas Instruments, Inc.
4.8%
McDonald’s Corp.
4.6%
Mastercard, Inc. Class A
4.6%
Marsh & McLennan Cos., Inc.
4.5%
Coca-Cola Co.
4.5%
Sectors
(% of Total Investments)
Information Technology
27.1%
Financials
25.1%
Health Care
12.2%
Consumer Discretionary
9.6%
Industrials
9.0%
Consumer Staples
8.4%
Materials
4.8%
Communication Services
2.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Foreign 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 Foreign 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
$50
0.92%*
[24]
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.92% [24]
Net Assets $ 171,900,000
Holdings Count | $ / shares 109
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$171.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
109
Portfolio Turnover Rate
6%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Sony Group Corp.
2.7%
Hitachi Ltd.
2.2%
SAP SE
2.1%
Societe Generale SA
1.9%
Roche Holding AG
1.9%
Nestle SA Registered
1.8%
Sumitomo Mitsui Financial Group, Inc.
1.7%
Heidelberg Materials AG
1.7%
Lloyds Banking Group PLC
1.7%
Seven & i Holdings Co. Ltd.
1.7%
Sectors
(% of Total Investments)
Financials
24.4%
Industrials
16.0%
Information Technology
12.0%
Consumer Discretionary
11.4%
Consumer Staples
9.9%
Health Care
9.4%
Materials
6.7%
Energy
6.4%
Utilities
1.7%
Communication Services
1.4%
Real Estate
0.7%
Largest Countries
(% of Total Investments)
Japan
20.2%
United Kingdom
13.5%
Germany
13.1%
United States
12.0%
France
10.9%
Netherlands
3.8%
Australia
3.8%
Ireland
2.7%
Sweden
2.5%
Belgium
2.3%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Foreign 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 Foreign 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
$64
1.17%*
[25]
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.17% [25]
Net Assets $ 171,900,000
Holdings Count | $ / shares 109
Investment Company Portfolio Turnover 6.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$171.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
109
Portfolio Turnover Rate
6%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Sony Group Corp.
2.7%
Hitachi Ltd.
2.2%
SAP SE
2.1%
Societe Generale SA
1.9%
Roche Holding AG
1.9%
Nestle SA Registered
1.8%
Sumitomo Mitsui Financial Group, Inc.
1.7%
Heidelberg Materials AG
1.7%
Lloyds Banking Group PLC
1.7%
Seven & i Holdings Co. Ltd.
1.7%
Sectors
(% of Total Investments)
Financials
24.4%
Industrials
16.0%
Information Technology
12.0%
Consumer Discretionary
11.4%
Consumer Staples
9.9%
Health Care
9.4%
Materials
6.7%
Energy
6.4%
Utilities
1.7%
Communication Services
1.4%
Real Estate
0.7%
Largest Countries
(% of Total Investments)
Japan
20.2%
United Kingdom
13.5%
Germany
13.1%
United States
12.0%
France
10.9%
Netherlands
3.8%
Australia
3.8%
Ireland
2.7%
Sweden
2.5%
Belgium
2.3%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Fundamental Equity 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 Fundamental 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
Class II
$42
0.81%*
[26]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.81% [26]
Net Assets $ 138,300,000
Holdings Count | $ / shares 71
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$138.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
71
Portfolio Turnover Rate
25%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Microsoft Corp.
9.1%
NVIDIA Corp.
8.2%
Apple, Inc.
5.4%
Amazon.com, Inc.
5.1%
Alphabet, Inc. Class A
3.3%
Meta Platforms, Inc. Class A
3.3%
Broadcom, Inc.
3.0%
JPMorgan Chase & Co.
2.7%
Philip Morris International, Inc.
2.4%
Mastercard, Inc. Class A
2.0%
Sectors
(% of Total Investments)
Information Technology
32.8%
Financials
15.3%
Health Care
10.2%
Communication Services
9.0%
Consumer Discretionary
8.7%
Industrials
8.3%
Consumer Staples
5.4%
Energy
3.2%
Utilities
2.9%
Materials
2.0%
Real Estate
2.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Fundamental Equity 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 Fundamental 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 I
$54
1.06%*
[27]
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.06% [27]
Net Assets $ 138,300,000
Holdings Count | $ / shares 71
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$138.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
71
Portfolio Turnover Rate
25%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Microsoft Corp.
9.1%
NVIDIA Corp.
8.2%
Apple, Inc.
5.4%
Amazon.com, Inc.
5.1%
Alphabet, Inc. Class A
3.3%
Meta Platforms, Inc. Class A
3.3%
Broadcom, Inc.
3.0%
JPMorgan Chase & Co.
2.7%
Philip Morris International, Inc.
2.4%
Mastercard, Inc. Class A
2.0%
Sectors
(% of Total Investments)
Information Technology
32.8%
Financials
15.3%
Health Care
10.2%
Communication Services
9.0%
Consumer Discretionary
8.7%
Industrials
8.3%
Consumer Staples
5.4%
Energy
3.2%
Utilities
2.9%
Materials
2.0%
Real Estate
2.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class I  
Shareholder Report [Line Items]  
Fund Name MML Global Fund
Class Name 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 Global 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 I
$43
0.81%*
[28]
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.81% [28]
Net Assets $ 376,800,000
Holdings Count | $ / shares 62
Investment Company Portfolio Turnover 62.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$376.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
62
Portfolio Turnover Rate
62%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Meta Platforms, Inc. Class A
8.9%
Alphabet, Inc. Class A
8.2%
SAP SE
4.4%
NVIDIA Corp.
4.3%
S&P Global, Inc.
4.0%
Intuit, Inc.
3.5%
Airbus SE
3.2%
Visa, Inc. Class A
3.2%
Analog Devices, Inc.
3.1%
Microsoft Corp.
3.0%
Sectors
(% of Total Investments)
Information Technology
31.5%
Communication Services
22.2%
Financials
14.0%
Health Care
11.0%
Consumer Discretionary
9.9%
Industrials
6.0%
Materials
0.9%
Largest Countries
(% of Total Investments)
United States
62.2%
France
5.4%
Germany
5.2%
India
3.9%
Japan
3.1%
China
3.0%
Netherlands
2.4%
Italy
1.6%
Sweden
1.6%
Spain
1.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Global 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 Global 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
$43
0.80%*
[29]
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.80% [29]
Net Assets $ 376,800,000
Holdings Count | $ / shares 62
Investment Company Portfolio Turnover 62.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$376.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
62
Portfolio Turnover Rate
62%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Meta Platforms, Inc. Class A
8.9%
Alphabet, Inc. Class A
8.2%
SAP SE
4.4%
NVIDIA Corp.
4.3%
S&P Global, Inc.
4.0%
Intuit, Inc.
3.5%
Airbus SE
3.2%
Visa, Inc. Class A
3.2%
Analog Devices, Inc.
3.1%
Microsoft Corp.
3.0%
Sectors
(% of Total Investments)
Information Technology
31.5%
Communication Services
22.2%
Financials
14.0%
Health Care
11.0%
Consumer Discretionary
9.9%
Industrials
6.0%
Materials
0.9%
Largest Countries
(% of Total Investments)
United States
62.2%
France
5.4%
Germany
5.2%
India
3.9%
Japan
3.1%
China
3.0%
Netherlands
2.4%
Italy
1.6%
Sweden
1.6%
Spain
1.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Global 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 Global 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
$56
1.05%*
[30]
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.05% [30]
Net Assets $ 376,800,000
Holdings Count | $ / shares 62
Investment Company Portfolio Turnover 62.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$376.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
62
Portfolio Turnover Rate
62%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Meta Platforms, Inc. Class A
8.9%
Alphabet, Inc. Class A
8.2%
SAP SE
4.4%
NVIDIA Corp.
4.3%
S&P Global, Inc.
4.0%
Intuit, Inc.
3.5%
Airbus SE
3.2%
Visa, Inc. Class A
3.2%
Analog Devices, Inc.
3.1%
Microsoft Corp.
3.0%
Sectors
(% of Total Investments)
Information Technology
31.5%
Communication Services
22.2%
Financials
14.0%
Health Care
11.0%
Consumer Discretionary
9.9%
Industrials
6.0%
Materials
0.9%
Largest Countries
(% of Total Investments)
United States
62.2%
France
5.4%
Germany
5.2%
India
3.9%
Japan
3.1%
China
3.0%
Netherlands
2.4%
Italy
1.6%
Sweden
1.6%
Spain
1.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Income & Growth 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 Income & Growth 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
$37
0.72%*
[31]
Expenses Paid, Amount $ 37
Expense Ratio, Percent 0.72% [31]
Net Assets $ 131,500,000
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$131.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
89
Portfolio Turnover Rate
16%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Philip Morris International, Inc.
2.5%
Air Products & Chemicals, Inc.
2.4%
Entergy Corp.
2.3%
Fidelity National Information Services, Inc.
2.3%
Wells Fargo & Co.
2.2%
Medtronic PLC
2.2%
Prologis, Inc.
2.1%
Merck & Co., Inc.
2.1%
Xcel Energy, Inc.
2.1%
Chubb Ltd.
2.1%
Sectors
(% of Total Investments)
Financials
18.7%
Health Care
13.2%
Industrials
10.4%
Energy
9.0%
Information Technology
8.0%
Utilities
7.9%
Consumer Staples
7.8%
Real Estate
6.8%
Materials
6.2%
Consumer Discretionary
4.4%
Communication Services
3.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Income & Growth 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 Income & Growth 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
$49
0.97%*
[32]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.97% [32]
Net Assets $ 131,500,000
Holdings Count | $ / shares 89
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$131.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
89
Portfolio Turnover Rate
16%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Philip Morris International, Inc.
2.5%
Air Products & Chemicals, Inc.
2.4%
Entergy Corp.
2.3%
Fidelity National Information Services, Inc.
2.3%
Wells Fargo & Co.
2.2%
Medtronic PLC
2.2%
Prologis, Inc.
2.1%
Merck & Co., Inc.
2.1%
Xcel Energy, Inc.
2.1%
Chubb Ltd.
2.1%
Sectors
(% of Total Investments)
Financials
18.7%
Health Care
13.2%
Industrials
10.4%
Energy
9.0%
Information Technology
8.0%
Utilities
7.9%
Consumer Staples
7.8%
Real Estate
6.8%
Materials
6.2%
Consumer Discretionary
4.4%
Communication Services
3.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML International Equity 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 International 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
Class II
$49
0.91%*
[33]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.91% [33]
Net Assets $ 253,300,000
Holdings Count | $ / shares 133
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)
$253.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
133
Portfolio Turnover Rate
18%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Hitachi Ltd.
2.0%
SAP SE
2.0%
BNP Paribas SA
2.0%
Roche Holding AG
2.0%
Schneider Electric SE
2.0%
Air Liquide SA
1.9%
Cie Financiere Richemont SA Registered Class A
1.8%
Capgemini SE
1.7%
Novartis AG Registered
1.7%
Rolls-Royce Holdings PLC
1.6%
Sectors
(% of Total Investments)
Financials
21.2%
Industrials
21.2%
Consumer Discretionary
15.0%
Health Care
11.6%
Information Technology
9.0%
Consumer Staples
8.4%
Materials
6.0%
Communication Services
3.1%
Energy
1.7%
Utilities
1.1%
Real Estate
0.2%
Largest Countries
(% of Total Investments)
France
16.8%
Japan
14.8%
Germany
13.1%
United Kingdom
11.4%
United States
10.3%
Switzerland
4.6%
Italy
3.5%
Netherlands
3.0%
China
2.5%
Canada
2.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML International Equity 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 International 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 I
$63
1.16%*
[34]
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.16% [34]
Net Assets $ 253,300,000
Holdings Count | $ / shares 133
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)
$253.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
133
Portfolio Turnover Rate
18%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Hitachi Ltd.
2.0%
SAP SE
2.0%
BNP Paribas SA
2.0%
Roche Holding AG
2.0%
Schneider Electric SE
2.0%
Air Liquide SA
1.9%
Cie Financiere Richemont SA Registered Class A
1.8%
Capgemini SE
1.7%
Novartis AG Registered
1.7%
Rolls-Royce Holdings PLC
1.6%
Sectors
(% of Total Investments)
Financials
21.2%
Industrials
21.2%
Consumer Discretionary
15.0%
Health Care
11.6%
Information Technology
9.0%
Consumer Staples
8.4%
Materials
6.0%
Communication Services
3.1%
Energy
1.7%
Utilities
1.1%
Real Estate
0.2%
Largest Countries
(% of Total Investments)
France
16.8%
Japan
14.8%
Germany
13.1%
United Kingdom
11.4%
United States
10.3%
Switzerland
4.6%
Italy
3.5%
Netherlands
3.0%
China
2.5%
Canada
2.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Large Cap Growth 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 Large Cap Growth 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
$36
0.70%*
[35]
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.70% [35]
Net Assets $ 218,400,000
Holdings Count | $ / shares 39
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$218.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
39
Portfolio Turnover Rate
2%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
10.0%
Meta Platforms, Inc. Class A
8.4%
Netflix, Inc.
8.0%
Tesla, Inc.
6.4%
Amazon.com, Inc.
5.8%
Oracle Corp.
5.6%
Visa, Inc. Class A
4.9%
Alphabet, Inc. Class A
4.8%
Boeing Co.
4.7%
Microsoft Corp.
4.6%
Sectors
(% of Total Investments)
Information Technology
29.6%
Communication Services
24.4%
Consumer Discretionary
15.8%
Health Care
10.3%
Financials
8.6%
Industrials
6.8%
Consumer Staples
2.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Large Cap Growth 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 Large Cap Growth 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
$49
0.95%*
[36]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.95% [36]
Net Assets $ 218,400,000
Holdings Count | $ / shares 39
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$218.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
39
Portfolio Turnover Rate
2%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
10.0%
Meta Platforms, Inc. Class A
8.4%
Netflix, Inc.
8.0%
Tesla, Inc.
6.4%
Amazon.com, Inc.
5.8%
Oracle Corp.
5.6%
Visa, Inc. Class A
4.9%
Alphabet, Inc. Class A
4.8%
Boeing Co.
4.7%
Microsoft Corp.
4.6%
Sectors
(% of Total Investments)
Information Technology
29.6%
Communication Services
24.4%
Consumer Discretionary
15.8%
Health Care
10.3%
Financials
8.6%
Industrials
6.8%
Consumer Staples
2.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Managed Volatility 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 Volatility 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
$43
0.86%*
[37]
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.86% [37]
Net Assets $ 94,300,000
Holdings Count | $ / shares 524
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$94.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
524
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.4%
Microsoft Corp.
7.1%
Apple, Inc.
5.9%
Amazon.com, Inc.
4.0%
Meta Platforms, Inc. Class A
3.1%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
2.0%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
33.3%
Financials
14.1%
Consumer Discretionary
10.4%
Communication Services
9.8%
Health Care
9.4%
Industrials
8.6%
Consumer Staples
5.5%
Energy
3.0%
Utilities
2.4%
Real Estate
2.1%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Managed Volatility 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 Volatility 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
$56
1.11%*
[38]
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.11% [38]
Net Assets $ 94,300,000
Holdings Count | $ / shares 524
Investment Company Portfolio Turnover 1.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$94.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
524
Portfolio Turnover Rate
1%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.4%
Microsoft Corp.
7.1%
Apple, Inc.
5.9%
Amazon.com, Inc.
4.0%
Meta Platforms, Inc. Class A
3.1%
Broadcom, Inc.
2.5%
Alphabet, Inc. Class A
2.0%
Berkshire Hathaway, Inc. Class B
1.7%
Tesla, Inc.
1.7%
Alphabet, Inc. Class C
1.6%
Sectors
(% of Total Investments)
Information Technology
33.3%
Financials
14.1%
Consumer Discretionary
10.4%
Communication Services
9.8%
Health Care
9.4%
Industrials
8.6%
Consumer Staples
5.5%
Energy
3.0%
Utilities
2.4%
Real Estate
2.1%
Materials
1.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Mid Cap Growth 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 Mid Cap Growth 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
$41
0.82%*
[39]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.82% [39]
Net Assets $ 301,900,000
Holdings Count | $ / shares 123
Investment Company Portfolio Turnover 39.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$301.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
123
Portfolio Turnover Rate
39%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Veeva Systems, Inc. Class A
2.2%
Hologic, Inc.
2.1%
Alnylam Pharmaceuticals, Inc.
1.9%
PTC, Inc.
1.8%
Hilton Worldwide Holdings, Inc.
1.7%
Cheniere Energy, Inc.
1.7%
Tyler Technologies, Inc.
1.7%
Agilent Technologies, Inc.
1.6%
Yum! Brands, Inc.
1.6%
Textron, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
19.5%
Health Care
18.9%
Industrials
16.7%
Consumer Discretionary
14.8%
Financials
8.9%
Energy
4.9%
Communication Services
4.8%
Materials
3.7%
Consumer Staples
3.6%
Real Estate
0.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Mid Cap Growth 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 Mid Cap Growth 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
$53
1.07%*
[40]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.07% [40]
Net Assets $ 301,900,000
Holdings Count | $ / shares 123
Investment Company Portfolio Turnover 39.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$301.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
123
Portfolio Turnover Rate
39%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Veeva Systems, Inc. Class A
2.2%
Hologic, Inc.
2.1%
Alnylam Pharmaceuticals, Inc.
1.9%
PTC, Inc.
1.8%
Hilton Worldwide Holdings, Inc.
1.7%
Cheniere Energy, Inc.
1.7%
Tyler Technologies, Inc.
1.7%
Agilent Technologies, Inc.
1.6%
Yum! Brands, Inc.
1.6%
Textron, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
19.5%
Health Care
18.9%
Industrials
16.7%
Consumer Discretionary
14.8%
Financials
8.9%
Energy
4.9%
Communication Services
4.8%
Materials
3.7%
Consumer Staples
3.6%
Real Estate
0.9%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Mid Cap Value 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 Mid Cap Value 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
$45
0.89%*
[41]
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89% [41]
Net Assets $ 237,800,000
Holdings Count | $ / shares 117
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$237.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
117
Portfolio Turnover Rate
38%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Zimmer Biomet Holdings, Inc.
2.7%
Enterprise Products Partners LP
2.1%
Henry Schein, Inc.
2.0%
U.S. Bancorp
2.0%
Truist Financial Corp.
2.0%
Willis Towers Watson PLC
1.8%
Northern Trust Corp.
1.8%
Labcorp Holdings, Inc.
1.7%
Kenvue, Inc.
1.7%
MSC Industrial Direct Co., Inc. Class A
1.6%
Sectors
(% of Total Investments)
Industrials
17.4%
Financials
16.7%
Health Care
15.4%
Consumer Staples
10.4%
Real Estate
9.0%
Utilities
8.0%
Information Technology
6.0%
Energy
5.7%
Materials
5.4%
Consumer Discretionary
3.2%
Communication Services
1.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Mid Cap Value 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 Mid Cap Value 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
$57
1.14%*
[42]
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.14% [42]
Net Assets $ 237,800,000
Holdings Count | $ / shares 117
Investment Company Portfolio Turnover 38.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$237.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
117
Portfolio Turnover Rate
38%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Zimmer Biomet Holdings, Inc.
2.7%
Enterprise Products Partners LP
2.1%
Henry Schein, Inc.
2.0%
U.S. Bancorp
2.0%
Truist Financial Corp.
2.0%
Willis Towers Watson PLC
1.8%
Northern Trust Corp.
1.8%
Labcorp Holdings, Inc.
1.7%
Kenvue, Inc.
1.7%
MSC Industrial Direct Co., Inc. Class A
1.6%
Sectors
(% of Total Investments)
Industrials
17.4%
Financials
16.7%
Health Care
15.4%
Consumer Staples
10.4%
Real Estate
9.0%
Utilities
8.0%
Information Technology
6.0%
Energy
5.7%
Materials
5.4%
Consumer Discretionary
3.2%
Communication Services
1.5%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Small Cap Growth 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 Growth 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
$53
1.08%*
[43]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.08% [43]
Net Assets $ 137,900,000
Holdings Count | $ / shares 171
Investment Company Portfolio Turnover 29.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$137.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
171
Portfolio Turnover Rate
29%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
AZEK Co., Inc.
2.1%
Verra Mobility Corp.
1.9%
AvePoint, Inc.
1.7%
American Healthcare REIT, Inc.
1.6%
Cabot Corp.
1.5%
Cadence Bank
1.4%
Zurn Elkay Water Solutions Corp. Class C
1.4%
CyberArk Software Ltd.
1.3%
Phillips Edison & Co., Inc.
1.3%
ExlService Holdings, Inc.
1.2%
Sectors
(% of Total Investments)
Industrials
25.5%
Health Care
19.2%
Information Technology
13.7%
Financials
12.2%
Consumer Discretionary
11.4%
Real Estate
5.0%
Energy
3.1%
Consumer Staples
2.7%
Communication Services
2.4%
Materials
1.9%
Utilities
1.3%
Exchange-Traded Funds
0.3%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Small Cap Growth 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 Growth 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
$65
1.33%*
[44]
Expenses Paid, Amount $ 65
Expense Ratio, Percent 1.33% [44]
Net Assets $ 137,900,000
Holdings Count | $ / shares 171
Investment Company Portfolio Turnover 29.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$137.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
171
Portfolio Turnover Rate
29%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
AZEK Co., Inc.
2.1%
Verra Mobility Corp.
1.9%
AvePoint, Inc.
1.7%
American Healthcare REIT, Inc.
1.6%
Cabot Corp.
1.5%
Cadence Bank
1.4%
Zurn Elkay Water Solutions Corp. Class C
1.4%
CyberArk Software Ltd.
1.3%
Phillips Edison & Co., Inc.
1.3%
ExlService Holdings, Inc.
1.2%
Sectors
(% of Total Investments)
Industrials
25.5%
Health Care
19.2%
Information Technology
13.7%
Financials
12.2%
Consumer Discretionary
11.4%
Real Estate
5.0%
Energy
3.1%
Consumer Staples
2.7%
Communication Services
2.4%
Materials
1.9%
Utilities
1.3%
Exchange-Traded Funds
0.3%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Small Company Value 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 Small Company Value 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
$47
0.99%*
[45]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.99% [45]
Net Assets $ 55,900,000
Holdings Count | $ / shares 105
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$55.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
105
Portfolio Turnover Rate
17%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Old National Bancorp
3.1%
Axis Capital Holdings Ltd.
2.8%
Timken Co.
2.6%
Webster Financial Corp.
2.5%
FNB Corp.
2.5%
Graphic Packaging Holding Co.
2.5%
SouthState Corp.
2.5%
EVERTEC, Inc.
2.2%
Enovis Corp.
2.0%
Brink’s Co.
2.0%
Sectors
(% of Total Investments)
Financials
36.6%
Industrials
17.2%
Consumer Discretionary
10.8%
Energy
10.1%
Real Estate
6.2%
Materials
4.8%
Information Technology
4.5%
Health Care
3.4%
Consumer Staples
3.0%
Communication Services
0.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Small Company Value 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 Small Company Value 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
$59
1.24%*
[46]
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.24% [46]
Net Assets $ 55,900,000
Holdings Count | $ / shares 105
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$55.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
105
Portfolio Turnover Rate
17%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Old National Bancorp
3.1%
Axis Capital Holdings Ltd.
2.8%
Timken Co.
2.6%
Webster Financial Corp.
2.5%
FNB Corp.
2.5%
Graphic Packaging Holding Co.
2.5%
SouthState Corp.
2.5%
EVERTEC, Inc.
2.2%
Enovis Corp.
2.0%
Brink’s Co.
2.0%
Sectors
(% of Total Investments)
Financials
36.6%
Industrials
17.2%
Consumer Discretionary
10.8%
Energy
10.1%
Real Estate
6.2%
Materials
4.8%
Information Technology
4.5%
Health Care
3.4%
Consumer Staples
3.0%
Communication Services
0.7%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Small/Mid Cap Value 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/Mid Cap Value 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
$41
0.83%*
[47]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.83% [47]
Net Assets $ 121,600,000
Holdings Count | $ / shares 94
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)
$121.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
94
Portfolio Turnover Rate
37%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
BJ’s Wholesale Club Holdings, Inc.
2.0%
Encompass Health Corp.
1.8%
TXNM Energy, Inc.
1.7%
Jones Lang LaSalle, Inc.
1.6%
IDACORP, Inc.
1.5%
Hanover Insurance Group, Inc.
1.5%
Tenet Healthcare Corp.
1.5%
Nexstar Media Group, Inc.
1.5%
Pentair PLC
1.5%
CACI International, Inc. Class A
1.4%
Sectors
(% of Total Investments)
Industrials
19.8%
Financials
19.3%
Information Technology
12.8%
Consumer Discretionary
9.2%
Real Estate
8.8%
Health Care
7.1%
Consumer Staples
5.6%
Materials
4.7%
Utilities
4.3%
Energy
4.1%
Communication Services
2.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Small/Mid Cap Value 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/Mid Cap Value 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
$53
1.08%*
[48]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.08% [48]
Net Assets $ 121,600,000
Holdings Count | $ / shares 94
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)
$121.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
94
Portfolio Turnover Rate
37%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
BJ’s Wholesale Club Holdings, Inc.
2.0%
Encompass Health Corp.
1.8%
TXNM Energy, Inc.
1.7%
Jones Lang LaSalle, Inc.
1.6%
IDACORP, Inc.
1.5%
Hanover Insurance Group, Inc.
1.5%
Tenet Healthcare Corp.
1.5%
Nexstar Media Group, Inc.
1.5%
Pentair PLC
1.5%
CACI International, Inc. Class A
1.4%
Sectors
(% of Total Investments)
Industrials
19.8%
Financials
19.3%
Information Technology
12.8%
Consumer Discretionary
9.2%
Real Estate
8.8%
Health Care
7.1%
Consumer Staples
5.6%
Materials
4.7%
Utilities
4.3%
Energy
4.1%
Communication Services
2.4%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Sustainable 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 Sustainable 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
$28
0.56%*
[49]
Expenses Paid, Amount $ 28
Expense Ratio, Percent 0.56% [49]
Net Assets $ 137,100,000
Holdings Count | $ / shares 106
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$137.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
106
Portfolio Turnover Rate
16%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Microsoft Corp.
8.6%
NVIDIA Corp.
7.1%
Apple, Inc.
4.1%
Amazon.com, Inc.
3.8%
Alphabet, Inc. Class A
3.8%
Broadcom, Inc.
3.2%
Meta Platforms, Inc. Class A
2.9%
Mastercard, Inc. Class A
1.9%
JPMorgan Chase & Co.
1.7%
Home Depot, Inc.
1.5%
Sectors
(% of Total Investments)
Information Technology
33.3%
Financials
15.1%
Consumer Discretionary
11.6%
Health Care
9.5%
Industrials
9.4%
Communication Services
8.5%
Consumer Staples
4.4%
Energy
2.3%
Materials
2.3%
Real Estate
2.0%
Utilities
1.4%
Exchange-Traded Funds
0.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Sustainable 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 Sustainable 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
$41
0.81%*
[50]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81% [50]
Net Assets $ 137,100,000
Holdings Count | $ / shares 106
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$137.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
106
Portfolio Turnover Rate
16%
Holdings [Text Block]
Largest Holdings
(% of Total Investments)
Microsoft Corp.
8.6%
NVIDIA Corp.
7.1%
Apple, Inc.
4.1%
Amazon.com, Inc.
3.8%
Alphabet, Inc. Class A
3.8%
Broadcom, Inc.
3.2%
Meta Platforms, Inc. Class A
2.9%
Mastercard, Inc. Class A
1.9%
JPMorgan Chase & Co.
1.7%
Home Depot, Inc.
1.5%
Sectors
(% of Total Investments)
Information Technology
33.3%
Financials
15.1%
Consumer Discretionary
11.6%
Health Care
9.5%
Industrials
9.4%
Communication Services
8.5%
Consumer Staples
4.4%
Energy
2.3%
Materials
2.3%
Real Estate
2.0%
Utilities
1.4%
Exchange-Traded Funds
0.0%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Class II  
Shareholder Report [Line Items]  
Fund Name MML Total Return 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 Total Return 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
0.60%*
[51]
Expenses Paid, Amount $ 30
Expense Ratio, Percent 0.60% [51]
Net Assets $ 382,400,000
Holdings Count | $ / shares 661
Investment Company Portfolio Turnover 276.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$382.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
661
Portfolio Turnover Rate
276%
Holdings [Text Block]
Portfolio Characteristics
(% of Total Investments)
U.S. Treasury Obligations
30.5%
U.S. Government Agency Obligations and Instrumentalities
30.3%
Non-U.S. Government Agency Obligations
14.9%
Corporate Debt
13.1%
Repurchase Agreement
8.5%
Bank Loans
1.3%
Sovereign Debt Obligations
0.5%
Municipal Obligations
0.5%
U.S. Treasury Bills
0.2%
Investment of Cash Collateral from Securities Loaned
0.1%
Common Stock
0.1%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Total Return 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 Total Return 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
$43
0.85%*
[52]
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.85% [52]
Net Assets $ 382,400,000
Holdings Count | $ / shares 661
Investment Company Portfolio Turnover 276.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2025)
Total Net Assets (Millions)
$382.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
661
Portfolio Turnover Rate
276%
Holdings [Text Block]
Portfolio Characteristics
(% of Total Investments)
U.S. Treasury Obligations
30.5%
U.S. Government Agency Obligations and Instrumentalities
30.3%
Non-U.S. Government Agency Obligations
14.9%
Corporate Debt
13.1%
Repurchase Agreement
8.5%
Bank Loans
1.3%
Sovereign Debt Obligations
0.5%
Municipal Obligations
0.5%
U.S. Treasury Bills
0.2%
Investment of Cash Collateral from Securities Loaned
0.1%
Common Stock
0.1%
Updated Prospectus Web Address https://www.massmutual.com/product-performance/variable-insurance-funds
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1 The Fund is a feeder fund. The expenses shown in this table reflect the aggregate expenses of both the feeder fund and the master fund.
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[48]
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