v3.26.1
Shareholder Report
 6 Months Ended
Jun. 30, 2026
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, 2026
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Class II  
Shareholder Report [Line Items]  
Fund Name MML Focused Equity Fund
Class Name Class II
No Trading Symbol 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, 2026 to June 30, 2026.
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
$46
0.92%
[1]
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.92%
Net Assets $ 125,800,000
Holdings Count | $ / shares 38
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$125.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
38
Portfolio Turnover Rate
30%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Broadcom, Inc.
6.3%
Eli Lilly & Co.
5.7%
Microsoft Corp.
4.9%
Mastercard, Inc. Class A
4.3%
Texas Instruments, Inc.
3.9%
KLA Corp.
3.6%
Visa, Inc. Class A
3.4%
Linde PLC (LIN US)
3.4%
Home Depot, Inc.
3.2%
Wells Fargo & Co.
3.1%
Sectors
(% of Total Investments)
Information Technology
26.4%
Financials
23.8%
Health Care
15.4%
Consumer Discretionary
10.4%
Industrials
8.4%
Consumer Staples
5.6%
Materials
3.4%
Communication Services
2.4%
Energy
1.6%
Utilities
1.0%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML Focused Equity Fund
Class Name Service Class I
No Trading Symbol 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, 2026 to June 30, 2026.
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
1.17%
[2]
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.17%
Net Assets $ 125,800,000
Holdings Count | $ / shares 38
Investment Company Portfolio Turnover 30.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$125.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
38
Portfolio Turnover Rate
30%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Broadcom, Inc.
6.3%
Eli Lilly & Co.
5.7%
Microsoft Corp.
4.9%
Mastercard, Inc. Class A
4.3%
Texas Instruments, Inc.
3.9%
KLA Corp.
3.6%
Visa, Inc. Class A
3.4%
Linde PLC (LIN US)
3.4%
Home Depot, Inc.
3.2%
Wells Fargo & Co.
3.1%
Sectors
(% of Total Investments)
Information Technology
26.4%
Financials
23.8%
Health Care
15.4%
Consumer Discretionary
10.4%
Industrials
8.4%
Consumer Staples
5.6%
Materials
3.4%
Communication Services
2.4%
Energy
1.6%
Utilities
1.0%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Foreign Fund
Class Name Initial Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$49
0.94%
[3]
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.94%
Net Assets $ 179,300,000
Holdings Count | $ / shares 108
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$179.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
108
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
ASML Holding NV
3.3%
Samsung Electronics Co. Ltd.
2.9%
Sumitomo Mitsui Financial Group, Inc.
2.3%
Societe Generale SA
2.3%
ORIX Corp.
2.2%
Veolia Environnement SA
2.1%
Roche Holding AG
2.0%
Panasonic Holdings Corp.
2.0%
Infineon Technologies AG
1.9%
Lloyds Banking Group PLC
1.9%
Sectors
(% of Total Investments)
Financials
27.5%
Information Technology
14.3%
Industrials
13.3%
Consumer Discretionary
10.1%
Health Care
9.9%
Consumer Staples
7.5%
Energy
6.4%
Materials
5.3%
Communication Services
2.1%
Utilities
2.1%
Real Estate
0.8%
Largest Countries
(% of Total Investments)
Japan
21.1%
United Kingdom
12.9%
Germany
12.0%
France
11.4%
United States
7.5%
Netherlands
5.6%
Australia
4.0%
Switzerland
3.3%
Ireland
3.0%
Republic of Korea
2.9%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Foreign Fund
Class Name Service Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$63
1.19%
[4]
Expenses Paid, Amount $ 63
Expense Ratio, Percent 1.19%
Net Assets $ 179,300,000
Holdings Count | $ / shares 108
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$179.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
108
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
ASML Holding NV
3.3%
Samsung Electronics Co. Ltd.
2.9%
Sumitomo Mitsui Financial Group, Inc.
2.3%
Societe Generale SA
2.3%
ORIX Corp.
2.2%
Veolia Environnement SA
2.1%
Roche Holding AG
2.0%
Panasonic Holdings Corp.
2.0%
Infineon Technologies AG
1.9%
Lloyds Banking Group PLC
1.9%
Sectors
(% of Total Investments)
Financials
27.5%
Information Technology
14.3%
Industrials
13.3%
Consumer Discretionary
10.1%
Health Care
9.9%
Consumer Staples
7.5%
Energy
6.4%
Materials
5.3%
Communication Services
2.1%
Utilities
2.1%
Real Estate
0.8%
Largest Countries
(% of Total Investments)
Japan
21.1%
United Kingdom
12.9%
Germany
12.0%
France
11.4%
United States
7.5%
Netherlands
5.6%
Australia
4.0%
Switzerland
3.3%
Ireland
3.0%
Republic of Korea
2.9%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Income & Growth Fund
Class Name Initial Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$38
0.73%
[5]
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.73%
Net Assets $ 133,400,000
Holdings Count | $ / shares 85
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$133.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
85
Portfolio Turnover Rate
19%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Hewlett Packard Enterprise Co.
3.1%
Merck & Co., Inc.
3.1%
Pinnacle West Capital Corp.
2.4%
UnitedHealth Group, Inc.
2.2%
Air Products & Chemicals, Inc.
2.2%
Xcel Energy, Inc.
2.1%
Johnson Controls International PLC
2.1%
Entergy Corp.
2.1%
Microchip Technology, Inc.
2.0%
Prologis, Inc.
2.0%
Sectors
(% of Total Investments)
Financials
17.1%
Information Technology
14.4%
Health Care
12.4%
Utilities
10.3%
Industrials
8.8%
Energy
8.5%
Consumer Staples
7.0%
Materials
6.9%
Real Estate
6.5%
Communication Services
3.9%
Consumer Discretionary
3.5%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Income & Growth Fund
Class Name Service Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$51
0.98%
[6]
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.98%
Net Assets $ 133,400,000
Holdings Count | $ / shares 85
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$133.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
85
Portfolio Turnover Rate
19%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Hewlett Packard Enterprise Co.
3.1%
Merck & Co., Inc.
3.1%
Pinnacle West Capital Corp.
2.4%
UnitedHealth Group, Inc.
2.2%
Air Products & Chemicals, Inc.
2.2%
Xcel Energy, Inc.
2.1%
Johnson Controls International PLC
2.1%
Entergy Corp.
2.1%
Microchip Technology, Inc.
2.0%
Prologis, Inc.
2.0%
Sectors
(% of Total Investments)
Financials
17.1%
Information Technology
14.4%
Health Care
12.4%
Utilities
10.3%
Industrials
8.8%
Energy
8.5%
Consumer Staples
7.0%
Materials
6.9%
Real Estate
6.5%
Communication Services
3.9%
Consumer Discretionary
3.5%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Small/Mid Cap Value Fund
Class Name Initial Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
0.83%
[7]
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.83%
Net Assets $ 131,100,000
Holdings Count | $ / shares 103
Investment Company Portfolio Turnover 35.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$131.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
103
Portfolio Turnover Rate
35%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
U.S. Foods Holding Corp.
1.7%
Hanover Insurance Group, Inc.
1.6%
Reliance, Inc.
1.6%
BorgWarner, Inc.
1.6%
Regal Rexnord Corp.
1.5%
F5, Inc.
1.5%
IDACORP, Inc.
1.5%
UMB Financial Corp.
1.5%
Everest Group Ltd.
1.4%
Tenet Healthcare Corp.
1.4%
Sectors
(% of Total Investments)
Industrials
23.1%
Financials
16.3%
Information Technology
12.7%
Consumer Discretionary
11.6%
Health Care
9.2%
Real Estate
6.8%
Materials
6.5%
Consumer Staples
5.6%
Utilities
3.4%
Energy
3.1%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Small/Mid Cap Value Fund
Class Name Service Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$59
1.08%
[8]
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.08%
Net Assets $ 131,100,000
Holdings Count | $ / shares 103
Investment Company Portfolio Turnover 35.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$131.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
103
Portfolio Turnover Rate
35%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
U.S. Foods Holding Corp.
1.7%
Hanover Insurance Group, Inc.
1.6%
Reliance, Inc.
1.6%
BorgWarner, Inc.
1.6%
Regal Rexnord Corp.
1.5%
F5, Inc.
1.5%
IDACORP, Inc.
1.5%
UMB Financial Corp.
1.5%
Everest Group Ltd.
1.4%
Tenet Healthcare Corp.
1.4%
Sectors
(% of Total Investments)
Industrials
23.1%
Financials
16.3%
Information Technology
12.7%
Consumer Discretionary
11.6%
Health Care
9.2%
Real Estate
6.8%
Materials
6.5%
Consumer Staples
5.6%
Utilities
3.4%
Energy
3.1%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML Sustainable Equity Fund
Class Name Initial Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$29
0.57%
[9]
Expenses Paid, Amount $ 29
Expense Ratio, Percent 0.57%
Net Assets $ 133,300,000
Holdings Count | $ / shares 107
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$133.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
107
Portfolio Turnover Rate
10%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.0%
Alphabet, Inc. Class A
6.5%
Microsoft Corp.
5.5%
Apple, Inc.
4.8%
Amazon.com, Inc.
3.4%
Broadcom, Inc.
3.3%
Micron Technology, Inc.
2.0%
Applied Materials, Inc.
1.8%
Eli Lilly & Co.
1.6%
NextEra Energy, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
38.0%
Financials
12.2%
Industrials
10.3%
Consumer Discretionary
9.0%
Communication Services
8.9%
Health Care
8.9%
Consumer Staples
3.2%
Real Estate
2.7%
Energy
2.3%
Materials
2.1%
Utilities
1.6%
Equity Funds
0.6%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML Sustainable Equity Fund
Class Name Service Class
No Trading Symbol 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, 2026 to June 30, 2026.
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
$42
0.82%
[10]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.82%
Net Assets $ 133,300,000
Holdings Count | $ / shares 107
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$133.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
107
Portfolio Turnover Rate
10%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.0%
Alphabet, Inc. Class A
6.5%
Microsoft Corp.
5.5%
Apple, Inc.
4.8%
Amazon.com, Inc.
3.4%
Broadcom, Inc.
3.3%
Micron Technology, Inc.
2.0%
Applied Materials, Inc.
1.8%
Eli Lilly & Co.
1.6%
NextEra Energy, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
38.0%
Financials
12.2%
Industrials
10.3%
Consumer Discretionary
9.0%
Communication Services
8.9%
Health Care
8.9%
Consumer Staples
3.2%
Real Estate
2.7%
Energy
2.3%
Materials
2.1%
Utilities
1.6%
Equity Funds
0.6%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Aggressive Allocation Fund (formerly known as MML Aggressive Allocation Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Aggressive Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$9
0.17%
[11]
Expenses Paid, Amount $ 9
Expense Ratio, Percent 0.17%
Net Assets $ 119,400,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$119.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
16%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
90.5%
Fixed Income Funds
9.5%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Aggressive Allocation Fund (formerly known as MML Aggressive Allocation Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Aggressive Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
0.42%
[12]
Expenses Paid, Amount $ 21
Expense Ratio, Percent 0.42%
Net Assets $ 119,400,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 16.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$119.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
16%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
90.5%
Fixed Income Funds
9.5%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP American Century Mid Cap Value Fund (formerly known as MML Mid Cap Value Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Century Mid Cap Value Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$47
0.90%
[13]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.90%
Net Assets $ 239,900,000
Holdings Count | $ / shares 132
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$239.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
132
Portfolio Turnover Rate
37%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Kimberly-Clark Corp.
2.2%
Zimmer Biomet Holdings, Inc.
2.0%
Commerce Bancshares, Inc.
2.0%
Henry Schein, Inc.
2.0%
Labcorp Holdings, Inc.
1.8%
Evergy, Inc.
1.6%
Packaging Corp. of America
1.6%
Xcel Energy, Inc.
1.6%
Becton Dickinson & Co.
1.6%
Enterprise Products Partners LP
1.6%
Sectors
(% of Total Investments)
Financials
17.1%
Industrials
16.1%
Health Care
14.9%
Utilities
9.7%
Information Technology
9.2%
Real Estate
7.9%
Energy
7.0%
Consumer Staples
6.0%
Consumer Discretionary
4.3%
Materials
4.3%
Communication Services
0.5%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP American Century Mid Cap Value Fund (formerly known as MML Mid Cap Value Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Century Mid Cap Value Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$60
1.15%
[14]
Expenses Paid, Amount $ 60
Expense Ratio, Percent 1.15%
Net Assets $ 239,900,000
Holdings Count | $ / shares 132
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$239.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
132
Portfolio Turnover Rate
37%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Kimberly-Clark Corp.
2.2%
Zimmer Biomet Holdings, Inc.
2.0%
Commerce Bancshares, Inc.
2.0%
Henry Schein, Inc.
2.0%
Labcorp Holdings, Inc.
1.8%
Evergy, Inc.
1.6%
Packaging Corp. of America
1.6%
Xcel Energy, Inc.
1.6%
Becton Dickinson & Co.
1.6%
Enterprise Products Partners LP
1.6%
Sectors
(% of Total Investments)
Financials
17.1%
Industrials
16.1%
Health Care
14.9%
Utilities
9.7%
Information Technology
9.2%
Real Estate
7.9%
Energy
7.0%
Consumer Staples
6.0%
Consumer Discretionary
4.3%
Materials
4.3%
Communication Services
0.5%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP American Century Small Company Value Fund (formerly known as MML Small Company Value Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Century Small Company Value Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$54
0.99%
[15]
Expenses Paid, Amount $ 54
Expense Ratio, Percent 0.99%
Net Assets $ 58,200,000
Holdings Count | $ / shares 114
Investment Company Portfolio Turnover 32.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$58.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
114
Portfolio Turnover Rate
32%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Southstate Bank Corp.
2.7%
Old National Bancorp
2.4%
EVERTEC, Inc.
2.4%
Home BancShares, Inc.
2.1%
UMB Financial Corp.
2.1%
Edgewell Personal Care Co.
2.1%
Columbia Banking System, Inc.
1.9%
Euronet Worldwide, Inc.
1.9%
Axis Capital Holdings Ltd.
1.9%
Entravision Communications Corp. Class A
1.9%
Sectors
(% of Total Investments)
Financials
31.0%
Industrials
14.2%
Consumer Discretionary
10.6%
Energy
9.5%
Information Technology
8.9%
Materials
5.3%
Real Estate
5.2%
Consumer Staples
4.8%
Health Care
3.6%
Communication Services
3.1%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP American Century Small Company Value Fund (formerly known as MML Small Company Value Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Century Small Company Value Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$68
1.24%
[16]
Expenses Paid, Amount $ 68
Expense Ratio, Percent 1.24%
Net Assets $ 58,200,000
Holdings Count | $ / shares 114
Investment Company Portfolio Turnover 32.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$58.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
114
Portfolio Turnover Rate
32%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Southstate Bank Corp.
2.7%
Old National Bancorp
2.4%
EVERTEC, Inc.
2.4%
Home BancShares, Inc.
2.1%
UMB Financial Corp.
2.1%
Edgewell Personal Care Co.
2.1%
Columbia Banking System, Inc.
1.9%
Euronet Worldwide, Inc.
1.9%
Axis Capital Holdings Ltd.
1.9%
Entravision Communications Corp. Class A
1.9%
Sectors
(% of Total Investments)
Financials
31.0%
Industrials
14.2%
Consumer Discretionary
10.6%
Energy
9.5%
Information Technology
8.9%
Materials
5.3%
Real Estate
5.2%
Consumer Staples
4.8%
Health Care
3.6%
Communication Services
3.1%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP American Funds 65/35 Allocation Fund (formerly known as MML American Funds Core Allocation Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Funds 65/35 Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$38
0.73%
[17]
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.73%
Net Assets $ 551,500,000
Holdings Count | $ / shares 5
Investment Company Portfolio Turnover 12.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$551.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
5
Portfolio Turnover Rate
12%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
66.4%
Fixed Income Funds
33.6%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP American Funds 80/20 Allocation Fund
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Funds 80/20 Allocation Fund (the “Fund”) for the period of April 24, 2026 to June 30, 2026.
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 investment*,1
Service Class I
$16
0.82%
[18],[19]
Expenses Paid, Amount $ 16
Expense Ratio, Percent 0.82% [19]
Net Assets $ 27,100,000
Holdings Count | $ / shares 5
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$27.1
Total Number of Portfolio Holdings (includes derivative positions, if any)
5
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
81.1%
Fixed Income Funds
18.9%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP American Funds Growth Fund (formerly known as MML American Funds Growth Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP American Funds Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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 investment*,1
Service Class I
$52
1.02%
[20],[21]
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.02% [21]
Net Assets $ 374,900,000
Holdings Count | $ / shares 1
Investment Company Portfolio Turnover 5.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$374.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
1
Portfolio Turnover Rate
5%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
100.0%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Balanced Allocation Fund (formerly known as MML Balanced Allocation Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Balanced Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[22]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.14%
Net Assets $ 259,900,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$259.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
10%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
51.5%
Fixed Income Funds
48.5%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Balanced Allocation Fund (formerly known as MML Balanced Allocation Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Balanced Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[23]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.39%
Net Assets $ 259,900,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 10.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$259.9
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
10%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
51.5%
Fixed Income Funds
48.5%
Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP BlackRock® Equity Index Fund (formerly known as MML Equity Index Fund)
Class Name Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP BlackRock® Equity Index Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[24]
Expenses Paid, Amount $ 22
Expense Ratio, Percent 0.43%
Net Assets $ 718,200,000
Holdings Count | $ / shares 507
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$718.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
507
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.5%
Apple, Inc.
6.6%
Microsoft Corp.
4.3%
Amazon.com, Inc.
3.6%
Alphabet, Inc. Class A
3.2%
Broadcom, Inc.
2.8%
Alphabet, Inc. Class C
2.6%
Micron Technology, Inc.
2.0%
Meta Platforms, Inc. Class A
1.9%
Tesla, Inc.
1.8%
Sectors
(% of Total Investments)
Information Technology
37.9%
Financials
11.7%
Communication Services
9.6%
Consumer Discretionary
9.3%
Industrials
8.9%
Health Care
8.9%
Consumer Staples
4.6%
Energy
3.0%
Utilities
2.2%
Materials
1.8%
Real Estate
1.8%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP BlackRock® Equity Index Fund (formerly known as MML Equity Index Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP BlackRock® Equity Index Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$15
0.28%
[25]
Expenses Paid, Amount $ 15
Expense Ratio, Percent 0.28%
Net Assets $ 718,200,000
Holdings Count | $ / shares 507
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$718.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
507
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.5%
Apple, Inc.
6.6%
Microsoft Corp.
4.3%
Amazon.com, Inc.
3.6%
Alphabet, Inc. Class A
3.2%
Broadcom, Inc.
2.8%
Alphabet, Inc. Class C
2.6%
Micron Technology, Inc.
2.0%
Meta Platforms, Inc. Class A
1.9%
Tesla, Inc.
1.8%
Sectors
(% of Total Investments)
Information Technology
37.9%
Financials
11.7%
Communication Services
9.6%
Consumer Discretionary
9.3%
Industrials
8.9%
Health Care
8.9%
Consumer Staples
4.6%
Energy
3.0%
Utilities
2.2%
Materials
1.8%
Real Estate
1.8%
Class III  
Shareholder Report [Line Items]  
Fund Name MML VIP BlackRock® Equity Index Fund (formerly known as MML Equity Index Fund)
Class Name Class III
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP BlackRock® Equity Index Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[26]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13%
Net Assets $ 718,200,000
Holdings Count | $ / shares 507
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$718.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
507
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.5%
Apple, Inc.
6.6%
Microsoft Corp.
4.3%
Amazon.com, Inc.
3.6%
Alphabet, Inc. Class A
3.2%
Broadcom, Inc.
2.8%
Alphabet, Inc. Class C
2.6%
Micron Technology, Inc.
2.0%
Meta Platforms, Inc. Class A
1.9%
Tesla, Inc.
1.8%
Sectors
(% of Total Investments)
Information Technology
37.9%
Financials
11.7%
Communication Services
9.6%
Consumer Discretionary
9.3%
Industrials
8.9%
Health Care
8.9%
Consumer Staples
4.6%
Energy
3.0%
Utilities
2.2%
Materials
1.8%
Real Estate
1.8%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP BlackRock® Equity Index Fund (formerly known as MML Equity Index Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP BlackRock® Equity Index Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[27]
Expenses Paid, Amount $ 35
Expense Ratio, Percent 0.68%
Net Assets $ 718,200,000
Holdings Count | $ / shares 507
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$718.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
507
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
7.5%
Apple, Inc.
6.6%
Microsoft Corp.
4.3%
Amazon.com, Inc.
3.6%
Alphabet, Inc. Class A
3.2%
Broadcom, Inc.
2.8%
Alphabet, Inc. Class C
2.6%
Micron Technology, Inc.
2.0%
Meta Platforms, Inc. Class A
1.9%
Tesla, Inc.
1.8%
Sectors
(% of Total Investments)
Information Technology
37.9%
Financials
11.7%
Communication Services
9.6%
Consumer Discretionary
9.3%
Industrials
8.9%
Health Care
8.9%
Consumer Staples
4.6%
Energy
3.0%
Utilities
2.2%
Materials
1.8%
Real Estate
1.8%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Conservative Allocation Fund (formerly known as MML Conservative Allocation Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Conservative Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
0.15%
[28]
Expenses Paid, Amount $ 8
Expense Ratio, Percent 0.15%
Net Assets $ 194,300,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$194.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
11%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Fixed Income Funds
58.6%
Equity Funds
41.4%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Conservative Allocation Fund (formerly known as MML Conservative Allocation Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Conservative Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
0.40%
[29]
Expenses Paid, Amount $ 20
Expense Ratio, Percent 0.40%
Net Assets $ 194,300,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$194.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
11%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Fixed Income Funds
58.6%
Equity Funds
41.4%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP Fidelity Institutional AM® Core Plus Bond Fund (formerly known as MML Total Return Bond Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Fidelity Institutional AM® Core Plus Bond Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$31
0.63%
[30]
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.63%
Net Assets $ 356,300,000
Holdings Count | $ / shares 1,082
Investment Company Portfolio Turnover 81.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$356.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
1,082
Portfolio Turnover Rate
81%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Portfolio Characteristics
(% of Total Investments)
U.S. Treasury Obligations
38.3%
Corporate Debt
30.2%
U.S. Government Agency Obligations and Instrumentalities
15.8%
Non-U.S. Government Agency Obligations
13.4%
Bank Loans
1.0%
Investment of Cash Collateral from Securities Loaned
0.9%
Repurchase Agreement
0.3%
Preferred Stock
0.1%
Common Stock
0.0%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP Fidelity Institutional AM® Core Plus Bond Fund (formerly known as MML Total Return Bond Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Fidelity Institutional AM® Core Plus Bond Fund†  (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$44
0.88%
[31]
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.88%
Net Assets $ 356,300,000
Holdings Count | $ / shares 1,082
Investment Company Portfolio Turnover 81.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$356.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
1,082
Portfolio Turnover Rate
81%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Portfolio Characteristics
(% of Total Investments)
U.S. Treasury Obligations
38.3%
Corporate Debt
30.2%
U.S. Government Agency Obligations and Instrumentalities
15.8%
Non-U.S. Government Agency Obligations
13.4%
Bank Loans
1.0%
Investment of Cash Collateral from Securities Loaned
0.9%
Repurchase Agreement
0.3%
Preferred Stock
0.1%
Common Stock
0.0%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Growth Allocation Fund (formerly known as MML Growth Allocation Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Growth Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[32]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13%
Net Assets $ 881,700,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$881.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
13%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
76.4%
Fixed Income Funds
23.6%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Growth Allocation Fund (formerly known as MML Growth Allocation Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Growth Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[33]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38%
Net Assets $ 881,700,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 13.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$881.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
13%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
76.4%
Fixed Income Funds
23.6%
Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP Invesco Global Fund (formerly known as MML Global Fund)
Class Name Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Invesco Global Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$40
0.78%
[34]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.78%
Net Assets $ 668,700,000
Holdings Count | $ / shares 63
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$668.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
63
Portfolio Turnover Rate
17%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Alphabet, Inc. Class A
9.4%
Lam Research Corp.
7.8%
Taiwan Semiconductor Manufacturing Co. Ltd.
7.6%
NVIDIA Corp.
5.7%
Meta Platforms, Inc. Class A
4.4%
Marvell Technology, Inc.
4.4%
Broadcom, Inc.
4.1%
Eli Lilly & Co.
3.7%
Visa, Inc. Class A
3.4%
Amazon.com, Inc.
3.2%
Sectors
(% of Total Investments)
Information Technology
46.8%
Communication Services
16.5%
Health Care
11.7%
Financials
11.3%
Consumer Discretionary
8.7%
Industrials
3.0%
Materials
1.1%
Largest Countries
(% of Total Investments)
United States
70.0%
Taiwan
7.6%
Netherlands
3.2%
France
2.4%
Switzerland
2.3%
Japan
2.1%
Canada
2.1%
India
1.9%
Germany
1.8%
Republic of Korea
1.8%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP Invesco Global Fund (formerly known as MML Global Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Invesco Global Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$40
0.78%
[35]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.78%
Net Assets $ 668,700,000
Holdings Count | $ / shares 63
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$668.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
63
Portfolio Turnover Rate
17%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Alphabet, Inc. Class A
9.4%
Lam Research Corp.
7.8%
Taiwan Semiconductor Manufacturing Co. Ltd.
7.6%
NVIDIA Corp.
5.7%
Meta Platforms, Inc. Class A
4.4%
Marvell Technology, Inc.
4.4%
Broadcom, Inc.
4.1%
Eli Lilly & Co.
3.7%
Visa, Inc. Class A
3.4%
Amazon.com, Inc.
3.2%
Sectors
(% of Total Investments)
Information Technology
46.8%
Communication Services
16.5%
Health Care
11.7%
Financials
11.3%
Consumer Discretionary
8.7%
Industrials
3.0%
Materials
1.1%
Largest Countries
(% of Total Investments)
United States
70.0%
Taiwan
7.6%
Netherlands
3.2%
France
2.4%
Switzerland
2.3%
Japan
2.1%
Canada
2.1%
India
1.9%
Germany
1.8%
Republic of Korea
1.8%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP Invesco Global Fund (formerly known as MML Global Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Invesco Global Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$53
1.03%
[36]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.03%
Net Assets $ 668,700,000
Holdings Count | $ / shares 63
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$668.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
63
Portfolio Turnover Rate
17%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Alphabet, Inc. Class A
9.4%
Lam Research Corp.
7.8%
Taiwan Semiconductor Manufacturing Co. Ltd.
7.6%
NVIDIA Corp.
5.7%
Meta Platforms, Inc. Class A
4.4%
Marvell Technology, Inc.
4.4%
Broadcom, Inc.
4.1%
Eli Lilly & Co.
3.7%
Visa, Inc. Class A
3.4%
Amazon.com, Inc.
3.2%
Sectors
(% of Total Investments)
Information Technology
46.8%
Communication Services
16.5%
Health Care
11.7%
Financials
11.3%
Consumer Discretionary
8.7%
Industrials
3.0%
Materials
1.1%
Largest Countries
(% of Total Investments)
United States
70.0%
Taiwan
7.6%
Netherlands
3.2%
France
2.4%
Switzerland
2.3%
Japan
2.1%
Canada
2.1%
India
1.9%
Germany
1.8%
Republic of Korea
1.8%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP Invesco Main Street Equity Fund (formerly known as MML Fundamental Equity Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Invesco Main Street Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$40
0.78%
[37]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.78%
Net Assets $ 373,500,000
Holdings Count | $ / shares 67
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$373.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
67
Portfolio Turnover Rate
28%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.6%
Alphabet, Inc. Class A
7.0%
Apple, Inc.
5.3%
Microsoft Corp.
5.0%
Amazon.com, Inc.
4.6%
Broadcom, Inc.
3.5%
JP Morgan Chase & Co.
3.3%
Applied Materials, Inc.
2.7%
Meta Platforms, Inc. Class A
2.6%
Philip Morris International, Inc.
2.6%
Sectors
(% of Total Investments)
Information Technology
34.8%
Financials
11.8%
Health Care
11.3%
Communication Services
10.5%
Consumer Discretionary
8.8%
Industrials
6.8%
Consumer Staples
5.4%
Energy
3.2%
Utilities
2.7%
Materials
2.5%
Real Estate
2.2%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP Invesco Main Street Equity Fund (formerly known as MML Fundamental Equity Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Invesco Main Street Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$53
1.03%
[38]
Expenses Paid, Amount $ 53
Expense Ratio, Percent 1.03%
Net Assets $ 373,500,000
Holdings Count | $ / shares 67
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$373.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
67
Portfolio Turnover Rate
28%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.6%
Alphabet, Inc. Class A
7.0%
Apple, Inc.
5.3%
Microsoft Corp.
5.0%
Amazon.com, Inc.
4.6%
Broadcom, Inc.
3.5%
JP Morgan Chase & Co.
3.3%
Applied Materials, Inc.
2.7%
Meta Platforms, Inc. Class A
2.6%
Philip Morris International, Inc.
2.6%
Sectors
(% of Total Investments)
Information Technology
34.8%
Financials
11.8%
Health Care
11.3%
Communication Services
10.5%
Consumer Discretionary
8.8%
Industrials
6.8%
Consumer Staples
5.4%
Energy
3.2%
Utilities
2.7%
Materials
2.5%
Real Estate
2.2%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP JPMorgan U.S. Research Enhanced Equity Fund (formerly known as MML Managed Volatility Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP JPMorgan U.S. Research Enhanced Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$39
0.76%
[39]
Expenses Paid, Amount $ 39
Expense Ratio, Percent 0.76%
Net Assets $ 335,600,000
Holdings Count | $ / shares 175
Investment Company Portfolio Turnover 32.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$335.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
175
Portfolio Turnover Rate
32%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.1%
Apple, Inc.
6.5%
Microsoft Corp.
4.8%
Amazon.com, Inc.
4.2%
Alphabet, Inc. Class A
3.4%
Broadcom, Inc.
3.0%
Alphabet, Inc. Class C
2.4%
Micron Technology, Inc.
2.3%
Meta Platforms, Inc. Class A
2.1%
Tesla, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
37.7%
Financials
12.1%
Consumer Discretionary
10.7%
Communication Services
9.6%
Health Care
8.8%
Industrials
8.6%
Consumer Staples
3.5%
Energy
2.9%
Utilities
2.2%
Materials
1.9%
Real Estate
1.7%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP JPMorgan U.S. Research Enhanced Equity Fund (formerly known as MML Managed Volatility Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP JPMorgan U.S. Research Enhanced Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$54
1.06%
[40]
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.06%
Net Assets $ 335,600,000
Holdings Count | $ / shares 175
Investment Company Portfolio Turnover 32.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$335.6
Total Number of Portfolio Holdings (includes derivative positions, if any)
175
Portfolio Turnover Rate
32%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
8.1%
Apple, Inc.
6.5%
Microsoft Corp.
4.8%
Amazon.com, Inc.
4.2%
Alphabet, Inc. Class A
3.4%
Broadcom, Inc.
3.0%
Alphabet, Inc. Class C
2.4%
Micron Technology, Inc.
2.3%
Meta Platforms, Inc. Class A
2.1%
Tesla, Inc.
1.6%
Sectors
(% of Total Investments)
Information Technology
37.7%
Financials
12.1%
Consumer Discretionary
10.7%
Communication Services
9.6%
Health Care
8.8%
Industrials
8.6%
Consumer Staples
3.5%
Energy
2.9%
Utilities
2.2%
Materials
1.9%
Real Estate
1.7%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Loomis Sayles Large Cap Growth Fund (formerly known as MML Large Cap Growth Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Loomis Sayles Large Cap Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$34
0.70%
[41]
Expenses Paid, Amount $ 34
Expense Ratio, Percent 0.70%
Net Assets $ 187,300,000
Holdings Count | $ / shares 35
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$187.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
35
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
12.6%
Alphabet, Inc. Class A
10.6%
Tesla, Inc.
8.4%
Meta Platforms, Inc. Class A
6.4%
Amazon.com, Inc.
6.3%
Visa, Inc. Class A
4.9%
Boeing Co.
4.8%
Microsoft Corp.
4.5%
Netflix, Inc.
4.2%
Oracle Corp.
3.7%
Sectors
(% of Total Investments)
Information Technology
27.0%
Communication Services
23.3%
Consumer Discretionary
17.7%
Health Care
11.4%
Industrials
7.5%
Financials
7.3%
Consumer Staples
3.7%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Loomis Sayles Large Cap Growth Fund (formerly known as MML Large Cap Growth Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Loomis Sayles Large Cap Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$46
0.95%
[42]
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.95%
Net Assets $ 187,300,000
Holdings Count | $ / shares 35
Investment Company Portfolio Turnover 2.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$187.3
Total Number of Portfolio Holdings (includes derivative positions, if any)
35
Portfolio Turnover Rate
2%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
12.6%
Alphabet, Inc. Class A
10.6%
Tesla, Inc.
8.4%
Meta Platforms, Inc. Class A
6.4%
Amazon.com, Inc.
6.3%
Visa, Inc. Class A
4.9%
Boeing Co.
4.8%
Microsoft Corp.
4.5%
Netflix, Inc.
4.2%
Oracle Corp.
3.7%
Sectors
(% of Total Investments)
Information Technology
27.0%
Communication Services
23.3%
Consumer Discretionary
17.7%
Health Care
11.4%
Industrials
7.5%
Financials
7.3%
Consumer Staples
3.7%
Class II  
Shareholder Report [Line Items]  
Fund Name MML VIP MFS® International Equity Fund (formerly known as MML International Equity Fund)
Class Name Class II
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP MFS® International Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
0.93%
[43]
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.93%
Net Assets $ 230,000,000.0
Holdings Count | $ / shares 75
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$230.0
Total Number of Portfolio Holdings (includes derivative positions, if any)
75
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Taiwan Semiconductor Manufacturing Co. Ltd.
4.4%
Novartis AG Registered
2.8%
Schneider Electric SE
2.8%
Roche Holding AG
2.7%
Air Liquide SA
2.5%
Rolls-Royce Holdings PLC
2.5%
Cie Financiere Richemont SA Registered Class A
2.4%
BNP Paribas SA
2.3%
Hitachi Ltd.
2.2%
Mitsubishi Electric Corp.
2.1%
Sectors
(% of Total Investments)
Financials
26.8%
Industrials
18.8%
Health Care
12.3%
Consumer Discretionary
10.9%
Information Technology
9.0%
Consumer Staples
8.4%
Materials
5.1%
Energy
3.5%
Communication Services
2.9%
Utilities
1.8%
Largest Countries
(% of Total Investments)
Japan
20.0%
France
15.2%
United Kingdom
12.9%
United States
10.0%
Switzerland
7.0%
Germany
5.4%
Italy
4.9%
Taiwan
4.4%
Ireland
2.4%
Spain
2.2%
Service Class I  
Shareholder Report [Line Items]  
Fund Name MML VIP MFS® International Equity Fund (formerly known as MML International Equity Fund)
Class Name Service Class I
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP MFS® International Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
1.18%
[44]
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.18%
Net Assets $ 230,000,000.0
Holdings Count | $ / shares 75
Investment Company Portfolio Turnover 7.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$230.0
Total Number of Portfolio Holdings (includes derivative positions, if any)
75
Portfolio Turnover Rate
7%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Taiwan Semiconductor Manufacturing Co. Ltd.
4.4%
Novartis AG Registered
2.8%
Schneider Electric SE
2.8%
Roche Holding AG
2.7%
Air Liquide SA
2.5%
Rolls-Royce Holdings PLC
2.5%
Cie Financiere Richemont SA Registered Class A
2.4%
BNP Paribas SA
2.3%
Hitachi Ltd.
2.2%
Mitsubishi Electric Corp.
2.1%
Sectors
(% of Total Investments)
Financials
26.8%
Industrials
18.8%
Health Care
12.3%
Consumer Discretionary
10.9%
Information Technology
9.0%
Consumer Staples
8.4%
Materials
5.1%
Energy
3.5%
Communication Services
2.9%
Utilities
1.8%
Largest Countries
(% of Total Investments)
Japan
20.0%
France
15.2%
United Kingdom
12.9%
United States
10.0%
Switzerland
7.0%
Germany
5.4%
Italy
4.9%
Taiwan
4.4%
Ireland
2.4%
Spain
2.2%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Moderate Allocation Fund (formerly known as MML Moderate Allocation Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Moderate Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[45]
Expenses Paid, Amount $ 7
Expense Ratio, Percent 0.13%
Net Assets $ 847,700,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$847.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
11%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
61.5%
Fixed Income Funds
38.5%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Moderate Allocation Fund (formerly known as MML Moderate Allocation Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Moderate Allocation Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[46]
Expenses Paid, Amount $ 19
Expense Ratio, Percent 0.38%
Net Assets $ 847,700,000
Holdings Count | $ / shares 24
Investment Company Portfolio Turnover 11.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$847.7
Total Number of Portfolio Holdings (includes derivative positions, if any)
24
Portfolio Turnover Rate
11%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Sectors
(% of Total Investments)
Equity Funds
61.5%
Fixed Income Funds
38.5%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Blue Chip Growth Fund (formerly known as MML Blue Chip Growth Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Blue Chip Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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%
[47]
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.79%
Net Assets $ 450,800,000
Holdings Count | $ / shares 64
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$450.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
64
Portfolio Turnover Rate
19%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
15.3%
Alphabet, Inc. Class C
6.3%
Applied Materials, Inc.
6.1%
Lam Research Corp.
5.9%
Alphabet, Inc. Class A
5.9%
Broadcom, Inc.
5.6%
Apple, Inc.
4.5%
Microsoft Corp.
4.4%
Meta Platforms, Inc. Class A
3.5%
Amazon.com, Inc.
3.3%
Sectors
(% of Total Investments)
Information Technology
51.4%
Communication Services
18.0%
Consumer Discretionary
11.7%
Financials
6.8%
Health Care
5.8%
Industrials
4.9%
Utilities
0.4%
Materials
0.3%
Retail
0.2%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Blue Chip Growth Fund (formerly known as MML Blue Chip Growth Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Blue Chip Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$52
1.04%
[48]
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.04%
Net Assets $ 450,800,000
Holdings Count | $ / shares 64
Investment Company Portfolio Turnover 19.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$450.8
Total Number of Portfolio Holdings (includes derivative positions, if any)
64
Portfolio Turnover Rate
19%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
NVIDIA Corp.
15.3%
Alphabet, Inc. Class C
6.3%
Applied Materials, Inc.
6.1%
Lam Research Corp.
5.9%
Alphabet, Inc. Class A
5.9%
Broadcom, Inc.
5.6%
Apple, Inc.
4.5%
Microsoft Corp.
4.4%
Meta Platforms, Inc. Class A
3.5%
Amazon.com, Inc.
3.3%
Sectors
(% of Total Investments)
Information Technology
51.4%
Communication Services
18.0%
Consumer Discretionary
11.7%
Financials
6.8%
Health Care
5.8%
Industrials
4.9%
Utilities
0.4%
Materials
0.3%
Retail
0.2%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Equity Income Fund (formerly known as MML Equity Income Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Equity Income Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$42
0.80%
[49]
Expenses Paid, Amount $ 42
Expense Ratio, Percent 0.80%
Net Assets $ 327,400,000
Holdings Count | $ / shares 119
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$327.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
119
Portfolio Turnover Rate
17%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Amazon.com, Inc.
5.4%
Microsoft Corp.
4.3%
Apple, Inc.
3.8%
MetLife, Inc.
2.0%
Intel Corp.
2.0%
Southern Co.
1.9%
Citigroup, Inc.
1.8%
QUALCOMM, Inc.
1.8%
JP Morgan Chase & Co.
1.7%
Colgate-Palmolive Co.
1.6%
Sectors
(% of Total Investments)
Financials
19.7%
Information Technology
16.4%
Industrials
13.8%
Health Care
13.0%
Energy
8.3%
Consumer Discretionary
7.4%
Consumer Staples
6.7%
Utilities
5.7%
Materials
3.0%
Real Estate
3.0%
Communication Services
2.6%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Equity Income Fund (formerly known as MML Equity Income Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Equity Income Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
1.05%
[50]
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.05%
Net Assets $ 327,400,000
Holdings Count | $ / shares 119
Investment Company Portfolio Turnover 17.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$327.4
Total Number of Portfolio Holdings (includes derivative positions, if any)
119
Portfolio Turnover Rate
17%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Amazon.com, Inc.
5.4%
Microsoft Corp.
4.3%
Apple, Inc.
3.8%
MetLife, Inc.
2.0%
Intel Corp.
2.0%
Southern Co.
1.9%
Citigroup, Inc.
1.8%
QUALCOMM, Inc.
1.8%
JP Morgan Chase & Co.
1.7%
Colgate-Palmolive Co.
1.6%
Sectors
(% of Total Investments)
Financials
19.7%
Information Technology
16.4%
Industrials
13.8%
Health Care
13.0%
Energy
8.3%
Consumer Discretionary
7.4%
Consumer Staples
6.7%
Utilities
5.7%
Materials
3.0%
Real Estate
3.0%
Communication Services
2.6%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Mid Cap Growth Fund (formerly known as MML Mid Cap Growth Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Mid Cap Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
0.81%
[51]
Expenses Paid, Amount $ 41
Expense Ratio, Percent 0.81%
Net Assets $ 403,500,000
Holdings Count | $ / shares 128
Investment Company Portfolio Turnover 42.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$403.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
128
Portfolio Turnover Rate
42%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Agilent Technologies, Inc.
2.4%
Keysight Technologies, Inc.
2.1%
Mettler-Toledo International, Inc.
2.0%
Teradyne, Inc.
2.0%
MACOM Technology Solutions Holdings, Inc.
2.0%
Datadog, Inc. Class A
1.9%
Yum! Brands, Inc.
1.8%
Burlington Stores, Inc.
1.7%
Lattice Semiconductor Corp.
1.7%
Assurant, Inc.
1.5%
Sectors
(% of Total Investments)
Information Technology
26.6%
Industrials
19.4%
Health Care
18.4%
Consumer Discretionary
13.5%
Financials
6.6%
Energy
4.0%
Consumer Staples
3.3%
Communication Services
3.2%
Materials
1.4%
Utilities
0.9%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP T. Rowe Price Mid Cap Growth Fund (formerly known as MML Mid Cap Growth Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP T. Rowe Price Mid Cap Growth Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$54
1.06%
[52]
Expenses Paid, Amount $ 54
Expense Ratio, Percent 1.06%
Net Assets $ 403,500,000
Holdings Count | $ / shares 128
Investment Company Portfolio Turnover 42.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$403.5
Total Number of Portfolio Holdings (includes derivative positions, if any)
128
Portfolio Turnover Rate
42%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
Agilent Technologies, Inc.
2.4%
Keysight Technologies, Inc.
2.1%
Mettler-Toledo International, Inc.
2.0%
Teradyne, Inc.
2.0%
MACOM Technology Solutions Holdings, Inc.
2.0%
Datadog, Inc. Class A
1.9%
Yum! Brands, Inc.
1.8%
Burlington Stores, Inc.
1.7%
Lattice Semiconductor Corp.
1.7%
Assurant, Inc.
1.5%
Sectors
(% of Total Investments)
Information Technology
26.6%
Industrials
19.4%
Health Care
18.4%
Consumer Discretionary
13.5%
Financials
6.6%
Energy
4.0%
Consumer Staples
3.3%
Communication Services
3.2%
Materials
1.4%
Utilities
0.9%
Initial Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Wellington Small Cap Growth Equity Fund (formerly known as MML Small Cap Growth Equity Fund)
Class Name Initial Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Wellington Small Cap Growth Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$59
1.07%
[53]
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.07%
Net Assets $ 155,200,000
Holdings Count | $ / shares 195
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$155.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
195
Portfolio Turnover Rate
37%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
MKS, Inc.
1.8%
Alignment Healthcare, Inc.
1.5%
American Healthcare REIT, Inc.
1.4%
SiTime Corp.
1.3%
Seacoast Banking Corp. of Florida
1.3%
Phillips Edison & Co., Inc.
1.2%
Xometry, Inc. Class A
1.2%
HA Sustainable Infrastructure Capital, Inc.
1.1%
Champion Homes, Inc.
1.1%
Credo Technology Group Holding Ltd.
1.1%
Sectors
(% of Total Investments)
Health Care
23.8%
Industrials
20.8%
Information Technology
15.7%
Financials
10.6%
Consumer Discretionary
7.9%
Real Estate
4.2%
Energy
3.6%
Materials
2.9%
Consumer Staples
1.9%
Utilities
1.4%
Communication Services
1.4%
Equity Funds
0.7%
Service Class  
Shareholder Report [Line Items]  
Fund Name MML VIP Wellington Small Cap Growth Equity Fund (formerly known as MML Small Cap Growth Equity Fund)
Class Name Service Class
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the MML VIP Wellington Small Cap Growth Equity Fund (the “Fund”) for the period of January 1, 2026 to June 30, 2026.
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
$73
1.32%
[54]
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.32%
Net Assets $ 155,200,000
Holdings Count | $ / shares 195
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
WHAT ARE SOME KEY FUND STATISTICS? (as of June 30, 2026)
Total Net Assets (Millions)
$155.2
Total Number of Portfolio Holdings (includes derivative positions, if any)
195
Portfolio Turnover Rate
37%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of June 30, 2026)
Derivative values, if any, are excluded from the table(s) below.
Largest Holdings
(% of Total Investments)
MKS, Inc.
1.8%
Alignment Healthcare, Inc.
1.5%
American Healthcare REIT, Inc.
1.4%
SiTime Corp.
1.3%
Seacoast Banking Corp. of Florida
1.3%
Phillips Edison & Co., Inc.
1.2%
Xometry, Inc. Class A
1.2%
HA Sustainable Infrastructure Capital, Inc.
1.1%
Champion Homes, Inc.
1.1%
Credo Technology Group Holding Ltd.
1.1%
Sectors
(% of Total Investments)
Health Care
23.8%
Industrials
20.8%
Information Technology
15.7%
Financials
10.6%
Consumer Discretionary
7.9%
Real Estate
4.2%
Energy
3.6%
Materials
2.9%
Consumer Staples
1.9%
Utilities
1.4%
Communication Services
1.4%
Equity Funds
0.7%
[1]
* Annualized
[2]
* Annualized
[3]
* Annualized
[4]
* Annualized
[5]
* Annualized
[6]
* Annualized
[7]
* Annualized
[8]
* Annualized
[9]
* Annualized
[10]
* Annualized
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[12]
* Annualized
[13]
* Annualized
[14]
* Annualized
[15]
* Annualized
[16]
* Annualized
[17]
* Annualized
[18]
* Annualized
[19]
1 Expenses shown are for the period from the commencement of the Fund’s investment operations, April 24, 2026, to June 30, 2026. Expenses for a full reporting period would have been higher.
[20]
* Annualized
[21]
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.
[22]
* Annualized
[23]
* Annualized
[24]
* Annualized
[25]
* Annualized
[26]
* Annualized
[27]
* Annualized
[28]
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[29]
* Annualized
[30]
* Annualized
[31]
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[32]
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[33]
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[34]
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[35]
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[36]
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[37]
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[38]
* Annualized
[39]
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[40]
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[41]
* Annualized
[42]
* Annualized
[43]
* Annualized
[44]
* Annualized
[45]
* Annualized
[46]
* Annualized
[47]
* Annualized
[48]
* Annualized
[49]
* Annualized
[50]
* Annualized
[51]
* Annualized
[52]
* Annualized
[53]
* Annualized
[54]
* Annualized