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Return Index1, U.S. Large Cap Equities, 6 Year, -10% Floor, 5.0% Cap Rate S&P 500® Price Return Index1, U.S. Large Cap Equities, 1 Year, -30% Buffer, 5.0% Cap Rate [Member] S&P 500® Price Return Index1, U.S. Large Cap Equities, 1 Year, -30% Buffer, 5.0% Cap Rate Cap Rates And Participatioin Rates [Member] Cap Rates And Participatioin Rates Invsesco QQQ ETF4, U.S. and International Large Cap Non-Financial Industry Equities offered via an ETF, 6 Year, -10% Buffer, 7.50% Cap Rate, 0% Trigger Point [Member] Invsesco QQQ ETF4, U.S. and International Large Cap Non-Financial Industry Equities offered via an ETF, 6 Year, -10% Buffer, 7.50% Cap Rate, 0% Trigger Point Minimum Contract Value Risk [Member] Minimum Contract Value Risk Nasdaq-100 Max 30TM Index2, U.S. and International Large Cap Non-Financial Industry Equities with Additional Volatility Control, 6 Year, -20% Buffer, 10.0% Participation Rate [Member] Nasdaq-100 Max 30TM Index2, U.S. and International Large Cap Non-Financial Industry 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Control, 6 Year, -10% Buffer, 10.0% Participation Rate S&P 500® Price Return Index1, U.S. Large Cap Equities, 1 Year, -20% Buffer, 2% Trigger Rate, -20% Trigger Point [Member] S&P 500® Price Return Index1, U.S. Large Cap Equities, 1 Year, -20% Buffer, 2% Trigger Rate, -20% Trigger Point C000154792 [Member] C000154792 Risk Associated With Indices [Member] Risk Associated With Indices Liquidity Risk [Member] Liquidity Risk Adverse Tax Consequences Risk [Member] Adverse Tax Consequences Risk Waiver Of Surrender Charge Rider [Member] Waiver Of Surrender Charge Rider C000078378 [Member] C000078378 Invsesco QQQ ETF4, U.S. and International Large Cap Non-Financial Industry Equities offered via an ETF, 1 Year, -30% Buffer, 7.5% Cap Rate, 0% Trigger Point [Member] Invsesco QQQ ETF4, U.S. and International Large Cap Non-Financial Industry Equities offered via an ETF, 1 Year, -30% Buffer, 7.5% Cap Rate, 0% Trigger Point MSCI EAFE Price Return Index1, International Equities, 6 Year, -10% Buffer, 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[Member] C000081128 C000135675 [Member] C000135675 S&P 500® Price Return Index1, U.S. Large Cap Equities, 3 Year, -10% Buffer, 5.0% Cap Rate [Member] S&P 500® Price Return Index1, U.S. Large Cap Equities, 3 Year, -10% Buffer, 5.0% Cap Rate MSCI EAFE Price Return Index1, International Equities, 6 Year, -20% Buffer, 10.0% Participation Rate [Member] MSCI EAFE Price Return Index1, International Equities, 6 Year, -20% Buffer, 10.0% Participation Rate C000121512 [Member] C000121512 S&P 500 35% Edge Volatility 1% Decrement Index (USD) ER3, U.S. Large Cap Equities with Additional Volatility Control, 6 Year, -20% Buffer, 10.0% Participation Rate [Member] S&P 500 35% Edge Volatility 1% Decrement Index (USD) ER3, U.S. Large Cap Equities with Additional Volatility Control, 6 Year, -20% Buffer, 10.0% Participation Rate Dollar Cost Averaging Program [Member] Dollar Cost Averaging Program Cybersecurity Risk [Member] Cybersecurity Risk Reference Indexes With Performance Drags [Member] Reference 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Industry Equities with Additional Volatility Control, 1 Year, -30% Buffer, 7.5% Cap Rate [Member] Nasdaq-100 Max 30TM Index2, U.S. and International Large Cap Non-Financial Industry Equities with Additional Volatility Control, 1 Year, -30% Buffer, 7.5% Cap Rate Trigger Point Rate Return Limit [Member] Trigger Point Rate Return Limit Cycle Investment Unit Value Based Upon Fair Value During Cycle Term [Member] Cycle Investment Unit Value Based Upon Fair Value During Cycle Term