Item 11. Benefits Available (N-3) [Text Block] Item 18. Options Available (N-3) [Text Block] All Classes: Ongoing Fees and Expenses [Table Text Block] Surrender Charge Phaseout Period, Years Generation [Axis] Current Generation: Transaction Charges [Text Block] Charges for Early Withdrawals [Text Block] Benefit [Axis] All Benefits: Lowest and Highest Annual Cost [Table Text Block] Lowest Annual Cost [Dollars] Highest Annual Cost [Dollars] Transaction Expenses [Table Text Block] Annual Portfolio Company Expenses [Table Text Block] Other Annual Expenses, Note [Text Block] Expense Reimbursements / Fee Waivers, Note [Text Block] Contract [Axis] All Contracts: Class [Axis] Fees and Expenses [Text Block] Risks [Table Text Block] Investment Professional Compensation [Text Block] Item 18. Portfolio Companies (N-6) [Text Block] Additional Information about Standard Death Benefits, Note (N-6) [Text Block] Charges and Contract Values, Note (N-6) [Text Block] Investment Option Objective (N-3) [Text Block] Investment Option Name (N-3) [Text Block] Investment Option Adviser [Text Block] Current Expenses Excluding Optional Benefit Expenses (N-3) [percent] Average Annual Total Returns, 1 Year [Percent] Average Annual Total Returns, 10 Years [Percent] Average Annual Total Returns, 5 Years [Percent] Some Investments not Available for all Benefits (N-3) [Text Block] Investment Objectives (N-3) [Text Block] Implementation of Investment Objectives (N-3) [Text Block] Investment Strategies (N-3) [Text Block] Industry Concentration Policy (N-3) [Text Block] Temporary Defensive Positions (N-3) [Text Block] Active and Frequent Trading (N-3) [Text Block] Principal Risks of Investing (N-3) [Text Block] How Investment Options Decide (N-3) [Text Block] Performance of Investment Option (N-3) [Text Block] Updated Performance Information (N-3) [Text Block] Average Annual Total Returns (N-3) [Table Text Block] YTD Return in Note (N-3) [Text Block] Lowest and Highest Quarterly Returns (N-3) [Table Text Block] Reason for Different Index and New and Former Index (N-3) [Text Block] Reason for Different Class of Multiple Classes (N-3) [Text Block] New Class of Multiple Classes (N-3) [Text Block] Temporary Fee Reductions, Annual Expenses (N-3) [Text Block] Name of Benefit [Text Block] Purpose of Benefit [Text Block] Benefits Description [Table Text Block] Benefit Standard or Optional [Text Block] Operation of Benefit [Text Block] Fees and Costs of Benefit [Text Block] Calculation Method of Benefit [Text Block] Benefits Available [Table Text Block] Limitations, Restrictions, and Risks of Benefit [Text Block] Portfolio Companies [Table Text Block] Investment Restrictions [Text Block] Optional Benefit Restrictions [Text Block] Item 19. Additional Information About Investment Options (N-3) [Text Block] Benefits Available (N-4) [Text Block] Item 11. Other Benefits Available (N-6) [Text Block] Portfolio Company Expenses [Text Block] Acquired Funds Expenses, Note [Text Block] Optional Benefits not Included, Note [Text Block] Portfolio Turnover [Text Block] Portfolio Turnover [Percent] Benefits Limitation [Table Text Block] Investment Option Expenses and Performance (N-3) [Table Text Block] Investment Option Available Benefits (N-3) [Table Text Block] Investment Option Available with Benefit [Flag] Benefit Not Available for Portfolio Company [Flag] Benefit not Available for Investment Option [Flag] Annual Return Bar Chart (N-3) [Table Text Block] Portfolio Company Available with Benefit [Flag] Portfolio Company Objective [Text Block] Portfolio Company Name [Text Block] Portfolio Company Adviser [Text Block] Current Expenses [Percent] Benefits Available for Portfolio Companies [Table Text Block] Temporary Fee Reductions, Current Expenses [Text Block] Platform Charge [Text Block] Platform Charge [Percent] Current Expenses + Platform Charge [Percent] Annual Return, 2010 [Percent] Annual Return, 2011 [Percent] Annual Return, 2012 [Percent] Annual Return, 2013 [Percent] Annual Return, 2014 [Percent] Annual Return, 2015 [Percent] Annual Return, 2016 [Percent] Annual Return, 2017 [Percent] Annual Return, 2018 [Percent] Annual Return, 2019 [Percent] Annual Return, 2020 [Percent] Annual Return, 2021 [Percent] Annual Return, 2022 [Percent] Annual Return, 2023 [Percent] Annual Return, 2024 [Percent] Annual Return, 2025 [Percent] Annual Return, 2026 [Percent] Annual Return, 2027 [Percent] Annual Return, 2028 [Percent] Annual Return, 2029 [Percent] Annual Return, 2030 [Percent] Annual Return, 2031 [Percent] Annual Return, 2032 [Percent] Highest Quarterly Return [Percent] Lowest Quarterly Return [Percent] Highest Quarterly Return [Date] Lowest Quarterly Return [Date] Expenses Restated, Note [Text Block] Extraordinary Expenses, Note [Text Block] Item 10. Standard Death Benefits (N-6) [Table Text Block] Sales Load, Description [Text Block] Sales Load, When Deducted [Text Block] Premium Taxes, Description [Text Block] Premium Taxes, When Deducted [Text Block] Deferred Sales Charge, Description [Text Block] Deferred Sales Charge, When Deducted [Text Block] Other Surrender Fees, Description [Text Block] Other Surrender Fees, When Deducted [Text Block] Transfer Fees, Description [Text Block] Transfer Fees, When Deducted [Text Block] Guaranteed Minimum Withdrawal [Text Block] Guaranteed Minimum Death Benefit [Text Block] Guaranteed Minimum Income [Text Block] Guaranteed Minimum Accumulation [Text Block] Annual Contract Expenses [Table Text Block] Surrender Example [Table Text Block] Annuitize Example [Table Text Block] No Surrender Example [Table Text Block] Periodic Charges [Table Text Block] Insurance Cost, Description [Text Block] Insurance Cost, When Deducted [Text Block] Annual Maintenance Fee, Description [Text Block] Annual Maintenance Fee, When Deducted [Text Block] Mortality and Expense Risk Fees, Description [Text Block] Mortality and Expense Risk Fees, When Deducted [Text Block] Administrative Expenses, Description [Text Block] Administrative Expenses, When Deducted [Text Block] Mortality Risk Fees, Description [Text Block] Mortality Risk Fees, When Deducted [Text Block] Expense Risk Fees, Description [Text Block] Expense Risk Fees, When Deducted [Text Block] Optional Benefit Charge, Description [Text Block] Optional Benefit Charge, When Deducted [Text Block] Standard Death Benefit [Text Block] Entity Investment Company Type Document Period End Date Amendment Description Amendment Flag Exchanges [Text Block] Some Portfolio Companies not Available for All Benefits [Text Block] Prospectuses Available [Text Block] Brief Restrictions / Limitations [Text Block] Standard Benefit [Flag] Optional Benefit [Flag] Portfolio Company [Axis] All Portfolio Companies: Prospectus: Prospectus [Line Items] Item 4. Fee Table [Text Block] Offered Starting [Date] Offered Ending [Date] Document Type Entity Registrant Name Entity Central Index Key Risk [Axis] All Risks: Item 5. Principal Risks [Table Text Block] Principal Risk [Text Block] Money Market Seven Day Yield, Phone Money Market, Seven Day Yield [Percent] Previously Offered [Member] Risk Money Market Fund May Not Preserve Dollar [Text Block] Risk Money Market Fund Price Fluctuates [Text Block] Risk Money Market Fund May Impose Fees Or Suspend Sales [Text Block] Risk Money Market Fund Sponsor May Not Provide Support [Text Block] Surrender Charge (of Amount Surrendered) Maximum [Percent] Surrender Charge (of Other Amount) Maximum [Percent] Risk [Text Block] Risk of Loss [Member] Not Short Term Investment Risk [Member] Investment Options Risk [Member] Insurance Company Risk [Member] Lowest Annual Cost Footnotes [Text Block] Highest Annual Cost Footnotes [Text Block] Surrender Charge (of Purchase Payments) Maximum [Percent] Surrender Charge Example Maximum [Dollars] Surrender Charge Footnotes [Text Block] Contract Expense (of Average Annual Net Assets) (N-3) Minimum [Percent] Contract Expense (of Average Annual Net Assets) (N-3) Maximum [Percent] Contract Expense (of Purchase Payments) (N-3) Minimum [Percent] Contract Expense (of Purchase Payments) (N-3) Maximum [Percent] Contract Expense (of Other Amount) (N-3) Minimum [Percent] Contract Expense (of Other Amount) (N-3) Maximum [Percent] Contract Expense (N-3) Footnotes [Text Block] Base Contract (of Average Annual Net Assets) (N-4) Minimum [Percent] Base Contract (of Average Annual Net Assets) (N-4) Maximum [Percent] Base Contract (of Purchase Payments) (N-4) Minimum [Percent] Base Contract (of Purchase Payments) (N-4) Maximum [Percent] Base Contract (of Other Amount) (N-4) Minimum [Percent] Base Contract (of Other Amount) (N-4) Maximum [Percent] Base Contract (N-4) Footnotes [Text Block] Investment Options (of Average Annual Net Assets) Minimum [Percent] Investment Options (of Average Annual Net Assets) Maximum [Percent] Investment Options (of Other Amount) Minimum [Percent] Investment Options (of Other Amount) Maximum [Percent] Investment Options Footnotes [Text Block] Optional Benefits Minimum [Percent] Optional Benefits Maximum [Percent] Optional Benefits Footnotes [Text Block] Contract Lapse Risk [Member] Sales Load (of Purchase Payments), Maximum [Percent] Sales Load (of Purchase Payments), Current [Percent] Sales Load (of Purchase Payments), Minimum [Percent] Sales Load, Footnotes [Text Block] Deferred Sales Load (of Purchase Payments), Maximum [Percent] Deferred Sales Load (of Purchase Payments), Current [Percent] Deferred Sales Load (of Purchase Payments), Minimum [Percent] Deferred Sales Load (of Amount Surrendered), Maximum [Percent] Deferred Sales Load (of Amount Surrendered), Current [Percent] Deferred Sales Load (of Amount Surrendered), Minimum [Percent] Deferred Sales Load (of Other Amount), Maximum [Percent] Deferred Sales Load (of Other Amount), Current [Percent] Deferred Sales Load (of Other Amount), Minimum [Percent] Deferred Sales Load, Footnotes [Text Block] Exchange Fee, Footnotes [Text Block] Administrative Expense, Maximum [Dollars] Administrative Expense, Current [Dollars] Administrative Expense, Minimum [Dollars] Administrative Expense, Footnotes [Text Block] Base Contract Expense (of Average Account Value), Maximum [Percent] Base Contract Expense (of Average Account Value), Current [Percent] Base Contract Expense (of Average Account Value), Minimum [Percent] Base Contract Expense (of Other Amount), Maximum [Percent] Base Contract Expense (of Other Amount), Current [Percent] Base Contract Expense (of Other Amount), Minimum [Percent] Base Contract Expense, Footnotes [Text Block] Optional Benefit Expense, Maximum [Dollars] Optional Benefit Expense, Current [Dollars] Optional Benefit Expense, Minimum [Dollars] Optional Benefit Expense (of Benefit Base), Maximum [Percent] Optional Benefit Expense (of Benefit Base), Current [Percent] Optional Benefit Expense (of Benefit Base), Minimum [Percent] Optional Benefit Expense (of Other Amount), Maximum [Percent] Optional Benefit Expense (of Other Amount), Current [Percent] Optional Benefit Expense (of Other Amount), Minimum [Percent] Optional Benefit Expense, Footnotes [Text Block] Other Annual Expense, Maximum [Dollars] Other Annual Expense, Footnotes [Text Block] Surrender Expense, 1 Year, Maximum [Dollars] Surrender Expense, 1 Year, Minimum [Dollars] Surrender Expense, 3 Years, Maximum [Dollars] Surrender Expense, 3 Years, Minimum [Dollars] Surrender Expense, 5 Years, Maximum [Dollars] Surrender Expense, 5 Years, Minimum [Dollars] Surrender Expense, 10 Years, Maximum [Dollars] Surrender Expense, 10 Years, Minimum [Dollars] Annuitized Expense, 1 Year, Maximum [Dollars] Annuitized Expense, 1 Year, Minimum [Dollars] Annuitized Expense, 3 Years, Maximum [Dollars] Annuitized Expense, 3 Years, Minimum [Dollars] Annuitized Expense, 5 Years, Maximum [Dollars] Annuitized Expense, 5 Years, Minimum [Dollars] Annuitized Expense, 10 Years, Maximum [Dollars] Annuitized Expense, 10 Years, Minimum [Dollars] No Surrender Expense, 1 Year, Maximum [Dollars] No Surrender Expense, 1 Year, Minimum [Dollars] No Surrender Expense, 3 Years, Maximum [Dollars] No Surrender Expense, 3 Years, Minimum [Dollars] No Surrender Expense, 5 Years, Maximum [Dollars] No Surrender Expense, 5 Years, Minimum [Dollars] No Surrender Expense, 10 Years, Maximum [Dollars] No Surrender Expense, 10 Years, Minimum [Dollars] Exchange Fee, Maximum [Dollars] Exchange Fee, Current [Dollars] Exchange Fee, Minimum [Dollars] Exchange Fee (of Amount Exchanged), Maximum [Percent] Exchange Fee (of Amount Exchanged), Current [Percent] Exchange Fee (of Amount Exchanged), Minimum [Percent] Exchange Fee (of Other Amount), Maximum [Percent] Exchange Fee (of Other Amount), Current [Percent] Exchange Fee (of Other Amount), Minimum [Percent] Other Transaction Fee (of Other Amount), Maximum [Percent] Other Transaction Fee, Current [Percent] Other Transaction Fee (of Other Amount), Minimum [Percent] Other Transaction Fee, Footnotes [Text Block] Portfolio Company Expenses, Footnotes [Text Block] Other Transaction Fee, Maximum [Dollars] Other Transaction Fee, Current [Dollars] Other Transaction Fee, Minimum [Dollars] Standard Benefit Expense, Maximum [Dollars] Standard Benefit Expense, Current [Dollars] Standard Benefit Expense, Minimum [Dollars] Standard Benefit Expense (of Benefit Base), Maximum [Percent] Standard Benefit Expense (of Benefit Base), Current [Percent] Standard Benefit Expense (of Benefit Base), Minimum [Percent] Standard Benefit Expense (of Other Amount), Maximum [Percent] Standard Benefit Expense (of Other Amount), Current [Percent] Standard Benefit Expense (of Other Amount), Minimum [Percent] Standard Benefit Expense, Footnotes [Text Block] Standard Death Benefit [Member] Portfolio Company Subadviser [Text Block] Redemption Fee, Maximum [Dollars] Redemption Fee, Current [Dollars] Redemption Fee, Minimum [Dollars] Redemption Fee (of Amount Redeemed), Maximum [Percent] Redemption Fee (of Amount Redeemed), Current [Percent] Redemption Fee (of Amount Redeemed), Minimum [Percent] Redemption Fee (of Other Amount), Maximum [Percent] Redemption Fee (of Other Amount), Current [Percent] Redemption Fee (of Other Amount), Minimum [Percent] Redemption Fee, Footnotes [Text Block] Other Annual Expense, Current [Dollars] Other Annual Expense, Minimum [Dollars] Management Fees (of Average Account Value), Maximum [Percent] Management Fees (of Average Account Value), Current [Percent] Management Fees (of Average Account Value), Minimum [Percent] Management Fees (of Other Amount), Maximum [Percent] Management Fees (of Other Amount), Current [Percent] Management Fees (of Other Amount), Minimum [Percent] Management Fees, Footnotes [Text Block] Other Annual Expense (of Average Account Value), Maximum [Percent] Other Annual Expense (of Average Account Value), Current [Percent] Other Annual Expense (of Average Account Value), Minimum [Percent] Other Annual Expense (of Other Amount), Maximum [Percent] Other Annual Expense (of Other Amount), Current [Percent] Other Annual Expense (of Other Amount), Minimum [Percent] Other Annual Expense 1, Maximum [Dollars] Other Annual Expense 1, Current [Dollars] Other Annual Expense 1, Minimum [Dollars] Other Annual Expense 1 (of Average Account Value), Maximum [Percent] Other Annual Expense 1 (of Average Account Value), Current [Percent] Other Annual Expense 1 (of Average Account Value), Minimum [Percent] Other Annual Expense 1 (of Other Amount), Maximum [Percent] Other Annual Expense 1 (of Other Amount), Current [Percent] Other Annual Expense 1 (of Other Amount), Minimum [Percent] Other Annual Expense 1, Footnotes [Text Block] Other Annual Expense 2, Maximum [Dollars] Other Annual Expense 2, Current [Dollars] Other Annual Expense 2, Minimum [Dollars] Other Annual Expense 2 (of Average Account Value), Maximum [Percent] Other Annual Expense 2 (of Average Account Value), Current [Percent] Other Annual Expense 2 (of Average Account Value), Minimum [Percent] Other Annual Expense 2 (of Other Amount), Maximum [Percent] Other Annual Expense 2 (of Other Amount), Current [Percent] Other Annual Expense 2 (of Other Amount), Minimum [Percent] Other Annual Expense 2, Footnotes [Text Block] Other Annual Expense 3, Maximum [Dollars] Other Annual Expense 3, Current [Dollars] Other Annual Expense 3, Minimum [Dollars] Other Annual Expense 3 (of Average Account Value), Maximum [Percent] Other Annual Expense 3 (of Average Account Value), Current [Percent] Other Annual Expense 3 (of Average Account Value), Minimum [Percent] Other Annual Expense 3 (of Other Amount), Maximum [Percent] Other Annual Expense 3 (of Other Amount), Current [Percent] Other Annual Expense 3 (of Other Amount), Minimum [Percent] Other Annual Expense 3, Footnotes [Text Block] Management Fees, Maximum [Dollars] Management Fees, Current [Dollars] Management Fees, Minimum [Dollars] Total Annual Expenses, Maximum [Percent] Total Annual Expenses, Current [Percent] Total Annual Expenses, Minimum [Percent] Total Annual Expenses, Footnotes [Text Block] Acquired Fund Expense [Dollars] Acquired Fund Expense (of Average Account Value) [Percent] Acquired Fund Expense (of Other Amount) [Percent] Acquired Fund Expense, Footnotes [Text Block] Administrative Expense (of Average Account Value), Maximum [Percent] Administrative Expense (of Average Account Value), Current [Percent] Administrative Expense (of Average Account Value), Minimum [Percent] Administrative Expense (of Other Amount), Maximum [Percent] Administrative Expense (of Other Amount), Current [Percent] Administrative Expense (of Other Amount), Minimum [Percent] Investment Option Subadviser [Text Block] Tax Implications [Text Block] Sales Load (of Premium Payments), Maximum [Percent] Sales Load (of Premium Payments), Current [Percent] Sales Load (of Premium Payments), Minimum [Percent] Sales Load (of Other Amount), Maximum [Percent] Sales Load (of Other Amount), Current [Percent] Sales Load (of Other Amount), Minimum [Percent] Deferred Sales Load, Maximum [Dollars] Deferred Sales Load, Current [Dollars] Deferred Sales Load, Minimum [Dollars] Transfer Fee, Maximum [Dollars] Transfer Fee, Current [Dollars] Transfer Fee, Minimum [Dollars] Transfer Fee (of Amount Transferred), Maximum [Percent] Transfer Fee (of Amount Transferred), Current [Percent] Transfer Fee (of Amount Transferred), Minimum [Percent] Transfer Fee (of Other Amount), Maximum [Percent] Transfer Fee (of Other Amount), Current [Percent] Transfer Fee (of Other Amount), Minimum [Percent] Transfer Fee, Footnotes [Text Block] Other Surrender Fees, Maximum [Dollars] Other Surrender Fees, Current [Dollars] Other Surrender Fees, Minimum [Dollars] Other Surrender Fees (of Other Amount), Maximum [Percent] Other Surrender Fees (of Other Amount), Current [Percent] Other Surrender Fees (of Other Amount), Minimum [Percent] Other Surrender Fees, Footnotes [Text Block] Premium Taxes, Maximum [Dollars] Premium Taxes, Current [Dollars] Premium Taxes, Minimum [Dollars] Premium Taxes (of Premium Payments), Maximum [Percent] Premium Taxes (of Premium Payments), Current [Percent] Premium Taxes (of Premium Payments), Minimum [Percent] Premium Taxes (of Other Amount), Maximum [Percent] Premium Taxes (of Other Amount), Current [Percent] Premium Taxes (of Other Amount), Minimum [Percent] Premium Taxes, Footnotes [Text Block] Other Transaction Fee, Description [Text Block] Other Transaction Fee, When Deducted [Text Block] Annual Maintenance Fee, Maximum [Dollars] Annual Maintenance Fee, Current [Dollars] Annual Maintenance Fee, Minimum [Dollars] Annual Maintenance Fee (of Policy Value), Maximum [Percent] Annual Maintenance Fee (of Policy Value), Current [Percent] Annual Maintenance Fee (of Policy Value), Minimum [Percent] Annual Maintenance Fee (of Other Amount), Maximum [Percent] Annual Maintenance Fee (of Other Amount), Current [Percent] Annual Maintenance Fee (of Other Amount), Minimum [Percent] Annual Maintenance Fee, Footnotes [Text Block] Insurance Cost, Maximum [Dollars] Insurance Cost, Current [Dollars] Insurance Cost, Minimum [Dollars] Insurance Cost (of Face Amount), Maximum [Percent] Insurance Cost (of Face Amount), Current [Percent] Insurance Cost (of Face Amount), Minimum [Percent] Insurance Cost (of Other Amount), Maximum [Percent] Insurance Cost (of Other Amount), Current [Percent] Insurance Cost (of Other Amount), Minimum [Percent] Insurance Cost, Footnotes [Text Block] Mortality Risk Fees, Maximum [Dollars] Mortality Risk Fees, Current [Dollars] Mortality Risk Fees, Minimum [Dollars] Mortality Risk Fees (of Face Amount), Maximum [Percent] Mortality Risk Fees (of Face Amount), Current [Percent] Mortality Risk Fees (of Face Amount), Minimum [Percent] Mortality Risk Fees (of Other Amount), Maximum [Percent] Mortality Risk Fees (of Other Amount), Current [Percent] Mortality Risk Fees (of Other Amount), Minimum [Percent] Mortality Risk Fees, Footnotes [Text Block] Expense Risk Fees, Maximum [Dollars] Expense Risk Fees, Current [Dollars] Expense Risk Fees, Minimum [Dollars] Expense Risk Fees (of Face Amount), Maximum [Percent] Expense Risk Fees (of Face Amount), Current [Percent] Expense Risk Fees (of Face Amount), Minimum [Percent] Expense Risk Fees (of Other Amount), Maximum [Percent] Expense Risk Fees (of Other Amount), Current [Percent] Expense Risk Fees (of Other Amount), Minimum [Percent] Expense Risk Fees, Footnotes [Text Block] Mortality And Expense Risk Fees, Maximum [Dollars] Mortality And Expense Risk Fees, Current [Dollars] Mortality And Expense Risk Fees, Minimum [Dollars] Mortality And Expense Risk Fees (of Face Amount), Maximum [Percent] Mortality And Expense Risk Fees (of Face Amount), Current [Percent] Mortality And Expense Risk Fees (of Face Amount), Minimum [Percent] Mortality And Expense Risk Fees (of Other Amount), Maximum [Percent] Mortality And Expense Risk Fees (of Other Amount), Current [Percent] Mortality And Expense Risk Fees (of Other Amount), Minimum [Percent] Mortality And Expense Risk Fees, Footnotes [Text Block] Administrative Expense (of Face Amount), Maximum [Percent] Administrative Expense (of Face Amount), Current [Percent] Administrative Expense (of Face Amount), Minimum [Percent] Other Annual Expense (of Face Amount), Maximum [Percent] Other Annual Expense (of Face Amount), Current [Percent] Other Annual Expense (of Face Amount), Minimum [Percent] Other Annual Expense, Description [Text Block] Other Annual Expense, When Deducted [Text Block] Insurance Cost, Representative Investor [Text Block] Annual Maintenance Fee, Representative Investor [Text Block] Mortality and Expense Risk Fees, Representative Investor [Text Block] Mortality Risk Fees, Representative Investor [Text Block] Expense Risk Fees, Representative Investor [Text Block] Administrative Expenses, Representative Investor [Text Block] Optional Benefit Charge, Representative [Text Block] Other Annual Expense, Representative [Text Block] Index [Axis] All Indexes: Series [Axis] All Series: Index-Linked Option Overview, Credits are Based in Part on Index Performance [Text Block] Index-Linked Option Overview, Investor Could Lose Money if Index Declines [Text Block] Index-Linked Option Overview, Limits the Negative Return [Text Block] Index-Linked Option Overview, Manner of Limiting the Negative Return [Text Block] Index-Linked Option Overview, Example of Limiting the Negative Return [Text Block] Index-Linked Option Overview, Guaranteed Minimum Limit on Index Losses [Text Block] Index-Linked Option Overview, Limiting Index Losses is not Guaranteed to be Offered [Text Block] Index-Linked Option Overview, Limits Positive Return [Text Block] Index-Linked Option Overview, Manner of Limiting the Positive Return [Text Block] Index-Linked Option Overview, Example of Limiting the Positive Return [Text Block] Return Limit Type [Axis] Index-Linked Option Overview, Lowest Limit on Gains [Percent] Overview, Investor Could Lose Money Due to Contract Adjustments if Amounts are Removed [Text Block] Overview, Transactions Subject to Contract Adjustments [Text Block] Key Information, Contract Adjustments if Amounts are Removed [Text Block] Key Information, Maximum Loss Resulting from Negative Adjustment [Percent] Key Information, Example of Maximum Loss Resulting from Negative Adjustment [Text Block] Key Information, Example of Maximum Loss on One Hundred Thousand Dollars Resulting from Negative Adjustment Key Information, Transactions Subject to Contract Adjustment [Text Block] Index-Linked Option, Implicit Ongoing Fees [Text Block] Index-Linked Option, Implicit Ongoing Fees Return may be Lower than the Index Return [Text Block] Index-Linked Option, Implicit Ongoing Fees Provide Some Protection from Index Losses [Text Block] Index-Linked Option, Implicit Ongoing Fees Not Reflected [Text Block] Item 2. Overview of the Contract [Line Items] Index-Linked Option Key Information, Maximum Loss Resulting from Negative Index Performance, Risk [Percent] Index-Linked Option Key Information, Highest Maximum Loss Resulting from Negative Index Performance, Risk [Percent] Index-Linked Option Key Information, Lowest Maximum Loss Resulting from Negative Index Performance, Risk [Percent] Index-Linked Option Key Information, Minimum Limit on Index Losses, Risk [Percent] Index-Linked Option Key Information, No Guaranteed Limit on Index Losses May Lose Entire Investment, Risk [Text Block] Key Information, Contract Adjustment Risk [Text Block] Key Information, Reallocation Risk [Text Block] Key Information, Default Reallocation Risk [Text Block] Index-Linked Option Key Information, Limits Positive Index Returns, Risk [Text Block] Index-Linked Option Key Information, Limits Positive Index Returns Example, Risk [Text Block] Item 3. Key Information [Line Items] Index-Linked Option Key Information, Limits Investor Earnings, Risk [Text Block] Index-Linked Option Key Information, Limits the Negative Return Risk [Text Block] Index-Linked Option Key Information, Example of Limiting the Negative Return Risk [Text Block] Index-Linked Option Key Information, Price Return Index, Risk [Text Block] Index-Linked Option Key Information, Price Return Index Includes Costs, Risk [Text Block] Index-Linked Option Key Information, Price Return Index Underperforms Direct Investments, Risk [Text Block] Contract Adjustments, Fee Table [Table Text Block] Index-Linked Option Fee Table, Limits Positive Returns Note [Text Block] Contract Adjustment, Maximum Potential Loss Over Value at Start of Crediting Period [Percent] Contract Adjustment, Maximum Potential Loss Over Amount Withdrawn [Percent] Transactions Subject to Contract Adjustment, Fee Table [Text Block] Market Risk [Member] Index-Linked Option Risk, Maximum Loss Resulting from Negative Index Performance [Percent] Index-Linked Option Risk, Highest Maximum Loss Resulting from Negative Index Performance [Percent] Index-Linked Option Risk, Lowest Maximum Loss Resulting from Negative Index Performance [Percent] Index-Linked Option Risk, Minimum Limit on Index Losses [Percent] Index-Linked Option Risk, No Guaranteed Limit on Index Losses May Lose Entire Investment [Text Block] Early Withdrawal Risk [Member] Risk, Maximum Loss Resulting from Negative Contract Adjustment [Percent] Index-Linked Option Risk [Member] Index-Linked Option Risk, Investor Not Invested in Index or Tracked Securities [Text Block] Index-Linked Option Risk, Limits Positive Returns [Text Block] Index-Linked Option Risk, Investor Could Lose Money Despite Limits on Negative Returns [Text Block] Index-Linked Option Risk, Interest Crediting [Text Block] Index-Linked Option Risk, Impact of Contract Fees [Text Block] Index-Linked Option Reallocation Risk [Text Block] Index-Linked Option Index Risk [Member] Index-Linked Option Risk, Index Risk [Text Block] Index Exclusion of Dividends Risk [Member] Index Market Volatility Risk [Member] Index Substitution Risk [Member] Contract Benefits Risk [Member] Contract Changes Risk [Member] Portfolio Company Changes Risk [Text Block] Index-Linked Option Changes Index Risk [Text Block] Index-Linked Option Changes Features Risk [Text Block] Stops Accepting Payments Risk [Text Block] Restrictions on Transfers Risk [Text Block] Exemption for Issuers of Securities Subject to Insurance Regulation [Flag] Index-Linked Option Details, Credits are Based in Part on Index Performance [Text Block] Index-Linked Option Details, Investor Not Invested in Index or Securities [Text Block] Index-Linked Option Details, Investor Could Lose Money if Index Declines [Text Block] Index-Linked Option Details, Investor Could Lose Money Due to Contract Adjustments if Amounts are Removed [Text Block] Index-Linked Option Details, Changes Possible [Text Block] Index-Linked Option Details, Features [Text Block] Index-Linked Option Details, Interest Crediting [Text Block] Index-Linked Option Details, Limits the Negative Return [Text Block] Index-Linked Option Details, Limits the Negative Return Manner [Text Block] Index-Linked Option Details, Example of Limiting the Negative Return [Text Block] Index-Linked Option Details, Current Limit on Index Losses [Percent] Index-Linked Option Details, Limit on Index Losses Will Not Change During Crediting Period [Text Block] Index-Linked Option Details, Guaranteed Minimum Limit on Index Losses [Text Block] Index-Linked Option Details, Limiting Index Losses is not Guaranteed to be Offered [Text Block] Index-Linked Option Details, Limits on Index Losses, Factors Considered [Text Block] Index-Linked Option Details, Limits on Index Losses, Investor Considerations [Text Block] Index-Linked Option Details, Limits Positive Return [Text Block] Index-Linked Option Details, Manner of Limiting the Positive Return [Text Block] Index-Linked Option Details, Example of Limiting the Positive Return [Text Block] Index-Linked Option Details, Current Limit on Index Gains [Percent] Index-Linked Option Details, Limit on Index Gains Will Not Change During Crediting Period [Text Block] Index-Linked Option Details, Lowest Limit on Gains [Percent] Index-Linked Option Details, Current Limit on Index Gains Website [Text Block] Index-Linked Option Details, Limits on Index Gains, Factors Considered [Text Block] Index-Linked Option Details, Limits on Index Gains, Investor Considerations [Text Block] Index-Linked Option Details, Crediting Periods [Text Block] Index-Linked Option Details, Crediting Periods Investor Considerations [Text Block] Index-Linked Option Details, Amounts Must Remain Until End of Crediting Period [Text Block] Index-Linked Option Details, Transactions Subject to Contract Adjustments [Text Block] Crediting Methodology [Axis] All Crediting Methodologies: Index-Linked Option Details, Crediting Methodology [Text Block] Index-Linked Option Details, Index Return [Table Text Block] Annual Return, Caption Annual Return, Inception Date Annual Return [Percent] Annual Return, Example Capped and Buffered Annual Return, Example Capped and Buffered [Percent] Index-Linked Option Details, Bar Chart Legend [Text Block] Index-Linked Option Details, Price Return Index Underperforms [Text Block] Index-Linked Option Details, Price Return Index Deducts Costs [Text Block] Index-Linked Option Details, Crediting Methodology Example [Text Block] Index-Linked Option Details, Crediting Methodology Example Legend [Text Block] Index-Linked Option Details, Index Investment Types [Text Block] Index-Linked Option Details, Index Additional Information [Text Block] Index-Linked Option Details, Exchange Traded Fund Performance Basis Index-Linked Option Details, Exchange Traded Fund Share Price [Flag] Index-Linked Option Details, Exchange Traded Fund Share Price Vs Total Return [Text Block] Index-Linked Option Details, Price Return Index Underperforms Direct Investments [Text Block] Index-Linked Option Details, Index Substitution [Text Block] Index-Linked Option Details, Index Substitution Circumstances [Text Block] Index-Linked Option Details, Index Substitution Selection [Text Block] Index-Linked Option Details, Index Substitution Notification [Text Block] Index-Linked Option Details, Index Substitution Calculation [Text Block] Index-Linked Option Details, Index Substitution Without Replacement [Text Block] Index-Linked Option Details, Maturity Notice [Flag] Index-Linked Option Details, Investor Reallocation [Text Block] Index-Linked Option Details, Default Reallocation [Text Block] Index-Linked Option Details, Notification of Availability [Text Block] Index-Linked Option Details, Other Material Features [Text Block] Fixed Option Details, Name Fixed Option Details, Description [Text Block] Fixed Option Details, Additional Information [Text Block] Fixed Option Details, Interest Crediting [Text Block] Fixed Option Details, Term [Text Block] Fixed Option Details, Minimum Guaranteed Interest Rate [Percent] Fixed Option Details, Investor Could Lose Money Due to Contract Adjustments if Amounts are Removed [Text Block] Fixed Option Details, Transactions Subject to Contract Adjustments [Text Block] Fixed Option Details, Maturity Notice [Flag] Fixed Option Details, Investor Reallocation [Text Block] Fixed Option Details, Default Reallocation [Text Block] Fixed Option Details, Notification of Availability [Text Block] Fixed Option Details, Other Material Features [Text Block] Contract Adjustment [Table Text Block] Contract Adjustment, Maximum Potential Loss [Percent] Contract Adjustment, Applicable Period [Text Block] Contract Adjustment, Applicable Transaction [Text Block] Contract Adjustment, Waiver Circumstances [Text Block] Contract Adjustment, Manner Determined [Text Block] Contract Adjustment, Effect on Value and Benefits [Text Block] Contract Adjustment, Negative Effect Could be Greater than Value Withdrawn [Text Block] Contract Adjustment, Impact of Adjustment on Interest Credited [Text Block] Contract Adjustment, Relationship to Other Charges [Text Block] Contract Adjustment, Purpose [Text Block] Contract Adjustment, Obtaining Current Value of an Adjustment [Text Block] Contract Adjustment, Current Value of an Adjustment Fluctuates [Text Block] Index-Linked Options Available, Legend [Text Block] Index-Linked Options Available [Table Text Block] Index-Linked Option Available, Guaranteed Minimum Limit on Index Losses [Percent] Index-Linked Option Available, Limiting Index Losses is not Guaranteed to be Offered [Text Block] Index-Linked Option Available, Lowest Limit on Gains [Percent] Index-Linked Option Available, Restrictions [Text Block] Index-Linked Option Available, Price Return Index Underperforms [Text Block] Index-Linked Option Available, Price Return Index Deducts Costs [Text Block] Index-Linked Option Available, Type of Index Index-Linked Option Available, Tracked Index [Text Block] Index-Linked Option Available, Crediting Period Index-Linked Option Available, Crediting Methodology Index-Linked Option Available, Current Limit on Index Losses [Percent] Index-Linked Option Available, Index Loss Limit Type Index-Linked Option Available, Minimum Limit on Index Gain [Percent] Index-Linked Option Available, Index Gain Limit Type Fixed Options Available Legend [Text Block] Fixed Options Available [Table Text Block] Fixed Option Available, Term Fixed Option Available, Minimum Guaranteed Interest Rate [Percent] Investment Option Restricted with Benefit [Flag] Non-variable Annuities [Table Text Block] Non-variable Annuities [Text Block] Non-variable Annuities, Name Non-variable Annuities, Number Outstanding Non-variable Annuities, Total Value Non-variable Annuities, Number Sold Non-variable Annuities, Gross Premiums Non-variable Annuities, Value Redeemed Non-variable Annuities, Combination [Flag] Item 2. Key Information [Line Items] All Return Limit Types: Investment Option [Axis] All Investment Options: Item 6. Description of Insurance Company, Registered Separate Account, and Investment Options [Line Items] Item 7. Charges and Adjustments [Line Items] Adjustment [Axis] All Adjustments: Investment Options (N-4) [Text Block] Variable Option [Line Items] Index-Linked Option [Line Items] Index-Linked Option Available, Name Fixed Option [Line Items] Fixed Option Available, Name Investment Options Not Always Available for All Benefits [Text Block] Investment Option Available Benefits [Table Text Block] Restrictions [Line Items] Changes in, and Disagreements with, Accountants [Text Block] Non-variable Annuities [Line Items] Index-Linked Option Details [Line Items] Fixed Option Details [Line Items] Index-Linked Option Details, Description [Text Block] Buffer Rate Return Limit [Member] Floor Rate Return Limit [Member] Cap Rate Return Limit [Member] Participation Rate Return Limit [Member] Index-Linked Option Market Risk [Line Items] Early Withdrawal Risk [Line Items] Index-Linked Option Risk [Line Items] Contract Changes Risk [Line Items] Index-Linked Option Details, Options Currently Offered [Line Items] Index-Linked Option Details, Interest Crediting [Line Items] Index-Linked Option Details, Limits on Index Losses [Line Items] Index-Linked Option Details, Limits on Index Gains [Line Items] Index-Linked Option Details, Crediting Period [Line Items] Index-Linked Option Details, Crediting Methodology [Line Items] Index-Linked Option Details, Indexes [Line Items] Index-Linked Option Details, Maturity [Line Items] Fixed Option Details, Interest Crediting [Line Items] Item 5. Principal Risks [Line Items] Item 4. Fee Table [Line Items] Item 10. Benefits Available [Line Items] Item 17. Investment Options [Line Items] Item 26(c). Changes in, and Disagreements with, Accountants [Line Items] Item 31A. Non-Variable Annuities [Line Items] Investment Option Restrictions [Line Items] Key Information, Benefit Restrictions [Text Block] Index-Linked Option Details, Price Return Index Does not Reflect Dividends [Text Block] Coregistrant [Axis] All Coregistrants [Member] Index Return [Axis] All Index Returns [Member] Postive Return [Member] Zero Return [Member] Negative Return [Member] Portfolio Company Expenses Before Waivers and Reimbursement Minimum [Percent] Portfolio Company Expenses After Waivers and Reimbursement Minimum [Percent] Portfolio Company Expenses Before Waivers and Reimbursement Maximum [Percent] Portfolio Company Expenses After Waivers and Reimbursement Maximum [Percent] Other Transaction Fee 1, Maximum [Dollars] Other Transaction Fee 1, Current [Dollars] Other Transaction Fee 1, Minimum [Dollars] Other Transaction Fee 1 (of Other Amount), Maximum [Percent] Other Transaction Fee 1 (of Other Amount), Current [Percent] Other Transaction Fee 1 (of Other Amount), Minimum [Percent] Other Transaction Fee 2, Maximum [Dollars] Other Transaction Fee 2, Current [Dollars] Other Transaction Fee 2, Minimum [Dollars] Other Transaction Fee 2 (of Other Amount), Maximum [Percent] Other Transaction Fee 2 (of Other Amount), Current [Percent] Other Transaction Fee 2 (of Other Amount), Minimum [Percent] Other Transaction Fee 3, Maximum [Dollars] Other Transaction Fee 3, Current [Dollars] Other Transaction Fee 3, Minimum [Dollars] Other Transaction Fee 3 (of Other Amount), Maximum [Percent] Other Transaction Fee 3 (of Other Amount), Current [Percent] Other Transaction Fee 3 (of Other Amount), Minimum [Percent] SEC Form N-3 2 SEC Form N-3 3 SEC Form N-3 3 SEC Form N-3 3 SEC Form N-3 3 SEC Form N-3 2 Instructions 2 SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 a SEC Form N-3 2 Instructions 2 b SEC 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SEC Form N-3 4 Instructions 11 SEC Form N-3 4 Instructions 11 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 12 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 13 SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 a SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC Form N-3 4 Instructions 15 b iii SEC 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