v3.26.3
N-4
Jun. 18, 2026
Prospectus:  
Document Type N-4
Entity Registrant Name Symetra Life Insurance Company
Entity Central Index Key 0001559495
Entity Investment Company Type N-4
Document Period End Date Sep. 23, 2026
Amendment Flag false
Index-Linked Option [Line Items]  
Index-Linked Options Available, Legend [Text Block]
The 6-Year Indexed Account listing under Appendix A: Investment Options Available Under the Contract is deleted and replaced with the following:
Index-Linked Options Available [Table Text Block] 6-YEAR INDEXED ACCOUNTS - ONLY AVAILABLE AT PURCHASE
Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Nasdaq 100
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Nasdaq 100
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 20.00%
Index-Linked Option Available, Index Loss Limit Type 20% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Nasdaq 100
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 100.00%
Index-Linked Option Available, Index Loss Limit Type 100% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Russell 2000, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Russell 2000
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Russell 2000, Market Index, 6-Year, Point to Point with Buffer with Charge, Cap and Participation Rate, 10% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Russell 2000
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer with Charge, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Russell 2000, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Russell 2000
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 20.00%
Index-Linked Option Available, Index Loss Limit Type 20% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Russell 2000, Market Index, 6-Year, Point to Point w Buffer with charge, Cap and Par Rate, 20% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Russell 2000
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 20.00%
Index-Linked Option Available, Index Loss Limit Type 20% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Russell 2000, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name Russell 2000
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 100.00%
Index-Linked Option Available, Index Loss Limit Type 100% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 1% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 1.00%
Index-Linked Option Available, Index Loss Limit Type 1% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer with Charge, Cap and Participation Rate, 1% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 1.00%
Index-Linked Option Available, Index Loss Limit Type 1% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer with Charge, Cap and Participation Rate, 10% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 30% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 30.00%
Index-Linked Option Available, Index Loss Limit Type 30% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer with Charge, Cap and Participation Rate, 20% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 20.00%
Index-Linked Option Available, Index Loss Limit Type 20% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer with Charge, Cap and Participation Rate, 30% Buffer with Charge, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 30.00%
Index-Linked Option Available, Index Loss Limit Type 30% Buffer with Charge
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 100.00%
Index-Linked Option Available, Index Loss Limit Type 100% Buffer
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer Plus, Cap and Participation Rate, 10% Buffer Plus, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 10.00%
Index-Linked Option Available, Index Loss Limit Type 10% Buffer Plus
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer Plus, Cap and Participation Rate, 20% Buffer Plus, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 20.00%
Index-Linked Option Available, Index Loss Limit Type 20% Buffer Plus
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
S&P 500, Market Index, 6-Year, Point to Point with Buffer Plus, Cap and Participation Rate, 30% Buffer Plus, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Name S&P 500
Index-Linked Option Available, Type of Index Market Index
Index-Linked Option Available, Crediting Period 6 years
Index-Linked Option Available, Crediting Methodology Point to Point with Buffer, Cap and Participation Rate
Index-Linked Option Available, Current Limit on Index Losses [Percent] 30.00%
Index-Linked Option Available, Index Loss Limit Type 30% Buffer Plus
Index-Linked Option Available, Index Gain Limit Type •2% Cap during Surrender Charge Period and 1% thereafter •100% Participation Rate
Participation Rate Return Limit [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 100.00%
Participation Rate Return Limit [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 100.00%
Participation Rate Return Limit [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 100.00%
Participation Rate Return Limit [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 100.00%
Cap Rate Return Limit During Surrender Charge Period [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 2.00%
Cap Rate Return Limit During Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 2.00%
Cap Rate Return Limit During Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 2.00%
Cap Rate Return Limit During Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 2.00%
Cap Rate Return Limit After Surrender Charge Period [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 1.00%
Cap Rate Return Limit After Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 10% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 1.00%
Cap Rate Return Limit After Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 20% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 1.00%
Cap Rate Return Limit After Surrender Charge Period [Member] | Nasdaq 100, Market Index, 6-Year, Point to Point with Buffer, Cap and Participation Rate, 100% Buffer, 2% Cap during Surrender Charge Period and 1% thereafter 100% Participation Rate [Member]  
Index-Linked Option [Line Items]  
Index-Linked Option Available, Minimum Limit on Index Gain [Percent] 1.00%