010001 - Document - Document And Entity Information {Elements} link:presentationLink link:calculationLink link:definitionLink 040014 - Document - Shareholder Report, Line Graph (Details) IYFS_MML Focused Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040015 - Document - Shareholder Report, Average Annual Return (Details) IYFS_MML Focused Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040016 - Document - Shareholder Report, Holdings (Details) IYFS_MML Focused Equity Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040018 - Document - Shareholder Report, Line Graph (Details) IYFS_MML Focused Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040019 - Document - Shareholder Report, Average Annual Return (Details) IYFS_MML Focused Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040020 - Document - Shareholder Report, Holdings (Details) IYFS_MML Focused Equity Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040022 - Document - Shareholder Report, Line Graph (Details) ITIQ_MML Foreign Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040023 - Document - Shareholder Report, Average Annual Return (Details) ITIQ_MML Foreign Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040024 - Document - Shareholder Report, Holdings (Details) ITIQ_MML Foreign Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040026 - Document - Shareholder Report, Line Graph (Details) ITIQ_MML Foreign Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040027 - Document - Shareholder Report, Average Annual Return (Details) ITIQ_MML Foreign Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040028 - Document - Shareholder Report, Holdings (Details) ITIQ_MML Foreign Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040030 - Document - Shareholder Report, Line Graph (Details) IYEK_MML Income - Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040031 - Document - Shareholder Report, Average Annual Return (Details) IYEK_MML Income - Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040032 - Document - Shareholder Report, Holdings (Details) IYEK_MML Income - Growth Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040034 - Document - Shareholder Report, Line Graph (Details) IYEK_MML Income - Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040035 - Document - Shareholder Report, Average Annual Return (Details) IYEK_MML Income - Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040036 - Document - Shareholder Report, Holdings (Details) IYEK_MML Income - Growth Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040038 - Document - Shareholder Report, Line Graph (Details) IZDE_MML Small-Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040039 - Document - Shareholder Report, Average Annual Return (Details) IZDE_MML Small-Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040040 - Document - Shareholder Report, Holdings (Details) IZDE_MML Small-Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040042 - Document - Shareholder Report, Line Graph (Details) IZDE_MML Small-Mid Cap Value Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040043 - Document - Shareholder Report, Average Annual Return (Details) IZDE_MML Small-Mid Cap Value Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040044 - Document - Shareholder Report, Holdings (Details) IZDE_MML Small-Mid Cap Value Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040046 - Document - Shareholder Report, Line Graph (Details) ITJR_MML Sustainable Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040047 - Document - Shareholder Report, Average Annual Return (Details) ITJR_MML Sustainable Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040048 - Document - Shareholder Report, Holdings (Details) ITJR_MML Sustainable Equity Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040050 - Document - Shareholder Report, Line Graph (Details) ITJR_MML Sustainable Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040051 - Document - Shareholder Report, Average Annual Return (Details) ITJR_MML Sustainable Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040052 - Document - Shareholder Report, Holdings (Details) ITJR_MML Sustainable Equity Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040054 - Document - Shareholder Report, Line Graph (Details) IZDS_MML VIP Aggressive Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040055 - Document - Shareholder Report, Average Annual Return (Details) IZDS_MML VIP Aggressive Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040056 - Document - Shareholder Report, Holdings (Details) IZDS_MML VIP Aggressive Allocation Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040058 - Document - Shareholder Report, Line Graph (Details) IZDS_MML VIP Aggressive Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040059 - Document - Shareholder Report, Average Annual Return (Details) IZDS_MML VIP Aggressive Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040060 - Document - Shareholder Report, Holdings (Details) IZDS_MML VIP Aggressive Allocation Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040062 - Document - Shareholder Report, Line Graph (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040063 - Document - Shareholder Report, Average Annual Return (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040064 - Document - Shareholder Report, Holdings (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040066 - Document - Shareholder Report, Line Graph (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040067 - Document - Shareholder Report, Average Annual Return (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040068 - Document - Shareholder Report, Holdings (Details) ITIM_MML VIP American Century Mid Cap Value Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040070 - Document - Shareholder Report, Line Graph (Details) ITJY_MML VIP American Century Small Company Value Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040071 - Document - Shareholder Report, Average Annual Return (Details) ITJY_MML VIP American Century Small Company Value Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040072 - Document - Shareholder Report, Holdings (Details) ITJY_MML VIP American Century Small Company Value Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040074 - Document - Shareholder Report, Line Graph (Details) ITJY_MML VIP American Century Small Company Value Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040075 - Document - Shareholder Report, Average Annual Return (Details) ITJY_MML VIP American Century Small Company Value Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040076 - Document - Shareholder Report, Holdings (Details) ITJY_MML VIP American Century Small Company Value Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040078 - Document - Shareholder Report, Line Graph (Details) TIM4_MML VIP American Funds 65-35 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040079 - Document - Shareholder Report, Average Annual Return (Details) TIM4_MML VIP American Funds 65-35 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040080 - Document - Shareholder Report, Holdings (Details) TIM4_MML VIP American Funds 65-35 Allocation Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040082 - Document - Shareholder Report, Line Graph (Details) TIMB_MML VIP American Funds 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040083 - Document - Shareholder Report, Average Annual Return (Details) TIMB_MML VIP American Funds 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040084 - Document - Shareholder Report, Holdings (Details) TIMB_MML VIP American Funds 80-20 Allocation Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040086 - Document - Shareholder Report, Line Graph (Details) TIM2_MML VIP American Funds Growth Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040087 - Document - Shareholder Report, Average Annual Return (Details) TIM2_MML VIP American Funds Growth Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040088 - Document - Shareholder Report, Holdings (Details) TIM2_MML VIP American Funds Growth Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040090 - Document - Shareholder Report, Line Graph (Details) IZDP_MML VIP Balanced Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040091 - Document - Shareholder Report, Average Annual Return (Details) IZDP_MML VIP Balanced Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040092 - Document - Shareholder Report, Holdings (Details) IZDP_MML VIP Balanced Allocation Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040094 - Document - Shareholder Report, Line Graph (Details) IZDP_MML VIP Balanced Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040095 - Document - Shareholder Report, Average Annual Return (Details) IZDP_MML VIP Balanced Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040096 - Document - Shareholder Report, Holdings (Details) IZDP_MML VIP Balanced Allocation Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040098 - Document - Shareholder Report, Line Graph (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040099 - Document - Shareholder Report, Average Annual Return (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040100 - Document - Shareholder Report, Holdings (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040102 - Document - Shareholder Report, Line Graph (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040103 - Document - Shareholder Report, Average Annual Return (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040104 - Document - Shareholder Report, Holdings (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040106 - Document - Shareholder Report, Line Graph (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class III_TSR SemiAnnual {Class III} link:presentationLink link:calculationLink link:definitionLink 040107 - Document - Shareholder Report, Average Annual Return (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class III_TSR SemiAnnual {Class III} link:presentationLink link:calculationLink link:definitionLink 040108 - Document - Shareholder Report, Holdings (Details) ITI9_MML VIP BlackRock Equity Index Fund_Class III_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040110 - Document - Shareholder Report, Line Graph (Details) ITI9_MML VIP BlackRock Equity Index Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040111 - Document - Shareholder Report, Average Annual Return (Details) ITI9_MML VIP BlackRock Equity Index Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040112 - Document - Shareholder Report, Holdings (Details) ITI9_MML VIP BlackRock Equity Index Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040114 - Document - Shareholder Report, Line Graph (Details) IZDO_MML VIP Conservative Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040115 - Document - Shareholder Report, Average Annual Return (Details) IZDO_MML VIP Conservative Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040116 - Document - Shareholder Report, Holdings (Details) IZDO_MML VIP Conservative Allocation Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040118 - Document - Shareholder Report, Line Graph (Details) IZDO_MML VIP Conservative Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040119 - Document - Shareholder Report, Average Annual Return (Details) IZDO_MML VIP Conservative Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040120 - Document - Shareholder Report, Holdings (Details) IZDO_MML VIP Conservative Allocation Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040122 - Document - Shareholder Report, Line Graph (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040123 - Document - Shareholder Report, Average Annual Return (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040124 - Document - Shareholder Report, Holdings (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040126 - Document - Shareholder Report, Line Graph (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040127 - Document - Shareholder Report, Average Annual Return (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040128 - Document - Shareholder Report, Holdings (Details) IYFI_MML VIP Fidelity Institutional AM Core Plus Bond Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040130 - Document - Shareholder Report, Line Graph (Details) IZDR_MML VIP Growth Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040131 - Document - Shareholder Report, Average Annual Return (Details) IZDR_MML VIP Growth Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040132 - Document - Shareholder Report, Holdings (Details) IZDR_MML VIP Growth Allocation Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040134 - Document - Shareholder Report, Line Graph (Details) IZDR_MML VIP Growth Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040135 - Document - Shareholder Report, Average Annual Return (Details) IZDR_MML VIP Growth Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040136 - Document - Shareholder Report, Holdings (Details) IZDR_MML VIP Growth Allocation Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040138 - Document - Shareholder Report, Line Graph (Details) ITJK_MML VIP Invesco Global Fund_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040139 - Document - Shareholder Report, Average Annual Return (Details) ITJK_MML VIP Invesco Global Fund_Class I_TSR SemiAnnual {Class I} link:presentationLink link:calculationLink link:definitionLink 040140 - Document - Shareholder Report, Holdings (Details) ITJK_MML VIP Invesco Global Fund_Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040142 - Document - Shareholder Report, Line Graph (Details) ITJK_MML VIP Invesco Global Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040143 - Document - Shareholder Report, Average Annual Return (Details) ITJK_MML VIP Invesco Global Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040144 - Document - Shareholder Report, Holdings (Details) ITJK_MML VIP Invesco Global Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040146 - Document - Shareholder Report, Line Graph (Details) ITJK_MML VIP Invesco Global Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040147 - Document - Shareholder Report, Average Annual Return (Details) ITJK_MML VIP Invesco Global Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040148 - Document - Shareholder Report, Holdings (Details) ITJK_MML VIP Invesco Global Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040150 - Document - Shareholder Report, Line Graph (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040151 - Document - Shareholder Report, Average Annual Return (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040152 - Document - Shareholder Report, Holdings (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040154 - Document - Shareholder Report, Line Graph (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040155 - Document - Shareholder Report, Average Annual Return (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040156 - Document - Shareholder Report, Holdings (Details) IYFU_MML VIP Invesco Main Street Equity Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040158 - Document - Shareholder Report, Line Graph (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040159 - Document - Shareholder Report, Average Annual Return (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040160 - Document - Shareholder Report, Holdings (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040162 - Document - Shareholder Report, Line Graph (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040163 - Document - Shareholder Report, Average Annual Return (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040164 - Document - Shareholder Report, Holdings (Details) ITIA_MML VIP JPMorgan U.S. Research Enhanced Equity Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040166 - Document - Shareholder Report, Line Graph (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040167 - Document - Shareholder Report, Average Annual Return (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040168 - Document - Shareholder Report, Holdings (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040170 - Document - Shareholder Report, Line Graph (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040171 - Document - Shareholder Report, Average Annual Return (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040172 - Document - Shareholder Report, Holdings (Details) ITIH_MML VIP Loomis Sayles Large Cap Growth Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040174 - Document - Shareholder Report, Line Graph (Details) IBLK_MML VIP MFS International Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040175 - Document - Shareholder Report, Average Annual Return (Details) IBLK_MML VIP MFS International Equity Fund_Class II_TSR SemiAnnual {Class II} link:presentationLink link:calculationLink link:definitionLink 040176 - Document - Shareholder Report, Holdings (Details) IBLK_MML VIP MFS International Equity Fund_Class II_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040178 - Document - Shareholder Report, Line Graph (Details) IBLK_MML VIP MFS International Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040179 - Document - Shareholder Report, Average Annual Return (Details) IBLK_MML VIP MFS International Equity Fund_Service Class I_TSR SemiAnnual {Service Class I} link:presentationLink link:calculationLink link:definitionLink 040180 - Document - Shareholder Report, Holdings (Details) IBLK_MML VIP MFS International Equity Fund_Service Class I_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040182 - Document - Shareholder Report, Line Graph (Details) IZDQ_MML VIP Moderate Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040183 - Document - Shareholder Report, Average Annual Return (Details) IZDQ_MML VIP Moderate Allocation Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040184 - Document - Shareholder Report, Holdings (Details) IZDQ_MML VIP Moderate Allocation Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040186 - Document - Shareholder Report, Line Graph (Details) IZDQ_MML VIP Moderate Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040187 - Document - Shareholder Report, Average Annual Return (Details) IZDQ_MML VIP Moderate Allocation Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040188 - Document - Shareholder Report, Holdings (Details) IZDQ_MML VIP Moderate Allocation Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040190 - Document - Shareholder Report, Line Graph (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040191 - Document - Shareholder Report, Average Annual Return (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040192 - Document - Shareholder Report, Holdings (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040194 - Document - Shareholder Report, Line Graph (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040195 - Document - Shareholder Report, Average Annual Return (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040196 - Document - Shareholder Report, Holdings (Details) ITIO_MML VIP T. Rowe Price Blue Chip Growth Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040198 - Document - Shareholder Report, Line Graph (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040199 - Document - Shareholder Report, Average Annual Return (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040200 - Document - Shareholder Report, Holdings (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040202 - Document - Shareholder Report, Line Graph (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040203 - Document - Shareholder Report, Average Annual Return (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040204 - Document - Shareholder Report, Holdings (Details) ITIJ_MML VIP T. Rowe Price Equity Income Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040206 - Document - Shareholder Report, Line Graph (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040207 - Document - Shareholder Report, Average Annual Return (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040208 - Document - Shareholder Report, Holdings (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040210 - Document - Shareholder Report, Line Graph (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040211 - Document - Shareholder Report, Average Annual Return (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040212 - Document - Shareholder Report, Holdings (Details) ITMC_MML VIP T. Rowe Price Mid Cap Growth Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040214 - Document - Shareholder Report, Line Graph (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040215 - Document - Shareholder Report, Average Annual Return (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Initial Class_TSR SemiAnnual {Initial Class} link:presentationLink link:calculationLink link:definitionLink 040216 - Document - Shareholder Report, Holdings (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Initial Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink 040218 - Document - Shareholder Report, Line Graph (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040219 - Document - Shareholder Report, Average Annual Return (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Service Class_TSR SemiAnnual {Service Class} link:presentationLink link:calculationLink link:definitionLink 040220 - Document - Shareholder Report, Holdings (Details) ITJC_MML VIP Wellington Small Cap Growth Equity Fund_Service Class_TSR SemiAnnual {Elements} link:presentationLink link:calculationLink link:definitionLink