010001 - Document - Document And Entity Information {Elements} link:presentationLink link:calculationLink link:definitionLink 040014 - Document - Shareholder Report, Line Graph (Details) ITIY_MML VIP Barings Core Bond Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040015 - Document - Shareholder Report, Average Annual Return (Details) ITIY_MML VIP Barings Core Bond Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040016 - Document - Shareholder Report, Holdings (Details) ITIY_MML VIP Barings Core Bond Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040018 - Document - Shareholder Report, Line Graph (Details) ITIY_MML VIP Barings Core Bond Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040019 - Document - Shareholder Report, Average Annual Return (Details) ITIY_MML VIP Barings Core Bond Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040020 - Document - Shareholder Report, Holdings (Details) ITIY_MML VIP Barings Core Bond Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040022 - Document - Shareholder Report, Line Graph (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040023 - Document - Shareholder Report, Average Annual Return (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040024 - Document - Shareholder Report, Holdings (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040026 - Document - Shareholder Report, Line Graph (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040027 - Document - Shareholder Report, Average Annual Return (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040028 - Document - Shareholder Report, Holdings (Details) ITJL_MML VIP Barings Inflation-Protected and Income Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040030 - Document - Shareholder Report, Line Graph (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040031 - Document - Shareholder Report, Average Annual Return (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040032 - Document - Shareholder Report, Holdings (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040034 - Document - Shareholder Report, Line Graph (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040035 - Document - Shareholder Report, Average Annual Return (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040036 - Document - Shareholder Report, Holdings (Details) IYFL_MML VIP Barings Short-Duration Bond Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040038 - Document - Shareholder Report, Line Graph (Details) ITIZ_MML VIP Barings U.S. Government Money Market Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040039 - Document - Shareholder Report, Average Annual Return (Details) ITIZ_MML VIP Barings U.S. Government Money Market Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040040 - Document - Shareholder Report, Holdings (Details) ITIZ_MML VIP Barings U.S. Government Money Market Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040042 - Document - Shareholder Report, Line Graph (Details) 2BAC_MML VIP BlackRock Balanced Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040043 - Document - Shareholder Report, Average Annual Return (Details) 2BAC_MML VIP BlackRock Balanced Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040044 - Document - Shareholder Report, Holdings (Details) 2BAC_MML VIP BlackRock Balanced Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040046 - Document - Shareholder Report, Line Graph (Details) 2BAC_MML VIP BlackRock Balanced Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040047 - Document - Shareholder Report, Average Annual Return (Details) 2BAC_MML VIP BlackRock Balanced Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040048 - Document - Shareholder Report, Holdings (Details) 2BAC_MML VIP BlackRock Balanced Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040050 - Document - Shareholder Report, Line Graph (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040051 - Document - Shareholder Report, Average Annual Return (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040052 - Document - Shareholder Report, Holdings (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040054 - Document - Shareholder Report, Line Graph (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040055 - Document - Shareholder Report, Average Annual Return (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040056 - Document - Shareholder Report, Holdings (Details) IT25_MML VIP BlackRock iShares 60-40 Allocation Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040058 - Document - Shareholder Report, Line Graph (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040059 - Document - Shareholder Report, Average Annual Return (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040060 - Document - Shareholder Report, Holdings (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040062 - Document - Shareholder Report, Line Graph (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040063 - Document - Shareholder Report, Average Annual Return (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040064 - Document - Shareholder Report, Holdings (Details) IT26_MML VIP BlackRock iShares 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040066 - Document - Shareholder Report, Line Graph (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040067 - Document - Shareholder Report, Average Annual Return (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040068 - Document - Shareholder Report, Holdings (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040070 - Document - Shareholder Report, Line Graph (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040071 - Document - Shareholder Report, Average Annual Return (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040072 - Document - Shareholder Report, Holdings (Details) 2BAK_MML VIP Franklin Templeton Equity Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040074 - Document - Shareholder Report, Line Graph (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040075 - Document - Shareholder Report, Average Annual Return (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040076 - Document - Shareholder Report, Holdings (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040078 - Document - Shareholder Report, Line Graph (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040079 - Document - Shareholder Report, Average Annual Return (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040080 - Document - Shareholder Report, Holdings (Details) IT8W_MML VIP Invesco Discovery Large Cap Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040082 - Document - Shareholder Report, Line Graph (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040083 - Document - Shareholder Report, Average Annual Return (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040084 - Document - Shareholder Report, Holdings (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040086 - Document - Shareholder Report, Line Graph (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040087 - Document - Shareholder Report, Average Annual Return (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040088 - Document - Shareholder Report, Holdings (Details) IT8X_MML VIP Invesco Discovery Mid Cap Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040090 - Document - Shareholder Report, Line Graph (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040091 - Document - Shareholder Report, Average Annual Return (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040092 - Document - Shareholder Report, Holdings (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040094 - Document - Shareholder Report, Line Graph (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040095 - Document - Shareholder Report, Average Annual Return (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040096 - Document - Shareholder Report, Holdings (Details) ITJH_MML VIP Invesco Small Cap Equity Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink