0001 - Document - Cover link:presentationLink link:definitionLink link:calculationLink 0002 - Disclosure - Senior Securities link:presentationLink link:definitionLink link:calculationLink 0003 - Disclosure - Summary of Fees & Expenses And Example Table link:presentationLink link:definitionLink link:calculationLink 0004 - Disclosure - General Description of Registrant link:presentationLink link:definitionLink link:calculationLink 0005 - Disclosure - Capital Stock Long Term Debt And Other Securities link:presentationLink link:definitionLink link:calculationLink Adverse Scrutiny Or Publicity Related To Fund Or Market For Longevity Assets Risk [Member] Adverse Scrutiny Or Publicity Related To Fund Or Market For Longevity Assets Risk [Member] Assets Reserved To Pay Premium And Fund Repurchases Will Have Minimal Return Risk [Member] Assets Reserved To Pay Premium And Fund Repurchases Will Have Minimal Return Risk [Member] Certain Longevity Assets May Expire When An Insured Attains A Certain Age Risk [Member] Certain Longevity Assets May Expire When An Insured Attains A Certain Age Risk [Member] Competition To Purchase Mortality Contracts By Issuers Risk [Member] Competition To Purchase Mortality Contracts By Issuers Risk [Member] Credit Risk Of Longevity Asset Issuers Risk [Member] Credit Risk Of Longevity Asset Issuers Risk [Member] Cybersecurity Risk [Member] Cybersecurity Risk [Member] Derivatives Risk [Member] Derivatives Risk [Member] Distribution Policy Risk [Member] Distribution Policy Risk [Member] Excise Tax Risk [Member] Excise Tax Risk [Member] Fair Value Estimation Using Historical Trade Data Risk [Member] Fair Value Estimation Using Historical Trade Data Risk [Member] Foreign Subsidiary Risk [Member] Foreign Subsidiary Risk [Member] Founders Class [Member] Founders Class [Member] Government Securities Risk [Member] Government Securities Risk [Member] I Class [Member] I Class [Member] Improvements In Medicine And Disease Treatment Risk [Member] Improvements In Medicine And Disease Treatment Risk [Member] Increased Premiums On Portfolio Mortality Contract Features Risk [Member] Increased Premiums On Portfolio Mortality Contract Features Risk [Member] Increased Premiums On Portfolio Mortality Contracts Risk [Member] Increased Premiums On Portfolio Mortality Contracts Risk [Member] Interval Fund Risk [Member] Interval Fund Risk [Member] Investor A Class [Member] Investor A Class [Member] Investor A Class Shares Five Percentage Load [Member] Investor A Class Shares Five Percentage Load [Member] 5% Sales Load [Member] Leveraging Risk [Member] Leveraging Risk [Member] Life Expectancy Provider Valuation Risk [Member] Life Expectancy Provider Valuation Risk [Member] Limited History Of Operations Risk [Member] Limited History Of Operations Risk [Member] Liquidity Requirements Risk [Member] Liquidity Requirements Risk [Member] Liquidity Risks Relating To Longevity Assets Risk [Member] Liquidity Risks Relating To Longevity Assets Risk [Member] Longevity Asset Litigation Risk [Member] Longevity Asset Litigation Risk [Member] Longevity Assets Acquisition Risk [Member] Longevity Assets Acquisition Risk [Member] Management Risk [Member] Management Risk [Member] Market Disruption And Geopolitical Risk [Member] Market Disruption And Geopolitical Risk [Member] Market Manipulation Risk [Member] Market Manipulation Risk [Member] Money Market Instruments Risk [Member] Money Market Instruments Risk [Member] Mortality Contract Maintenance Cost Estimation Risk [Member] Mortality Contract Maintenance Cost Estimation Risk [Member] Mortality Contract Market Volatility Risk [Member] Mortality Contract Market Volatility Risk [Member] Natural Disaster Epidemic Risk [Member] Natural Disaster/epidemic Risk [Member] Natural Disaster/Epidemic Risk [Member] New Manager Risk [Member] New Manager Risk [Member] Non Diversification Risk [Member] Non Diversification Risk [Member] Non-Diversification Risk [Member] Origination Risks For Acquiring Certain Mortality Contracts Risk [Member] Origination Risks For Acquiring Certain Mortality Contracts Risk [Member] Premium Funding On Indebted Mortality Contracts Risk [Member] Premium Funding On Indebted Mortality Contracts Risk [Member] Qualified Dividend Income Risk [Member] Qualified Dividend Income Risk [Member] Regulated Investment Company Status Risk [Member] Regulated Investment Company Status Risk [Member] Reliance On Manager Risk [Member] Reliance On Manager Risk [Member] Repurchase Policy Risk [Member] Repurchase Policy Risk [Member] Service Provider Risk [Member] Service Provider Risk [Member] Structured Finance Products Risk [Member] Structured Finance Products Risk [Member] Tracking Insureds And Annuitants Risk [Member] Tracking Insureds And Annuitants Risk [Member] Uncertainty Of Life Expectancy Estimates For Mortality Contracts Risk [Member] Uncertainty Of Life Expectancy Estimates For Mortality Contracts Risk [Member] Uncertainty Of Market For Longevity Assets Risk [Member] Uncertainty Of Market For Longevity Assets Risk [Member] United States Subsidiary Risk [Member] United States Subsidiary Risk [Member] U.S. Subsidiary Risk [Member] Validity Of (Updated) Underwriting Tables Used By Medical Underwriters For Certain Mortality Contracts Risk [Member] Validity Of (Updated) Underwriting Tables Used By Medical Underwriters For Certain Mortality Contracts Risk [Member] Valuation Of Longevity Assets Risk [Member] Valuation Of Longevity Assets Risk [Member] Volatile Markets Risk [Member] Volatile Markets Risk [Member] Class of Stock [Domain] Debt Instrument Name [Domain]