Principal Risks [Member] Not A Complete Investment Program [Member] Limited Term Risk [Member] Investment And Market Risk [Member] Management Risk [Member] Distribution Risk [Member] Income And Distribution Rate Risk [Member] Dividend Risk [Member] Income Securities Risk [Member] Issuer Risk [Member] Spread Risk [Member] Credit Risk [Member] Current Fixed Income And Debt Market Conditions [Member] Debt Overlay Strategy Risk [Member] Synthetic Autocallable E L N Strategy Risk [Member] Corporate Bond Risk [Member] Reinvestment Risk [Member] Extension Risk [Member] Prepayment Risk [Member] Private Credit Assets Risk [Member] Liquidity Risk [Member] Valuation Of Certain Income Securities Risk [Member] Duration And Maturity Risk [Member] Below Investment Grad Securities Risk [Member] Structured Finance Investments Risk [Member] Asset Backed Securities Risk [Member] Mortgage Backed Securities Risk [Member] Commercial Mortgage Backed Securities Risk [Member] Residential Mortgage Backed Securities Risk [Member] Sub Prime Mortgage Market Risk [Member] C L O C D O And C B O Risk [Member] Risks Associated With Risk Linked Securities [Member] C L O Subordinated Notes Risk [Member] Risks Associated With Structured Notes [Member] Senior Loans Risk [Member] Second Lien Loans Risk [Member] Subordinate Secured Loans Risk [Member] Unsecured Loans Risk [Member] Loans And Loan Participation And Assignments Risk [Member] Unfunded Commitments Risk [Member] Mezzanine Investments Risk [Member] Distressed And Defaulted Securities Risk [Member] Convertible Securities Risk [Member] Preferred Securities Or Stock Risk [Member] Foreign Securities Risk [Member] Emerging Markets Risk [Member] Foreign Currency Risk [Member] Sovereign Debt Risk [Member] Common Equity Securities Risk [Member] New Issues Risk [Member] Risks Associated with Options [Member] Real Property Asset Company Risks [Member] Energy Companies Risk [Member] Catastrophic Event Risk [Member] Energy Commodity Price Risk [Member] Energy Sector Regulatory Risk [Member] Industry Specific Risk [Member] R E I Ts Risk [Member] Nautral Resources And Commodities Risks [Member] Supply And Demand Risk [Member] Depletion And Exploration Risk [Member] Operational And Geological Risk [Member] Regulatory Risk [Member] Commodity Pricing Risk [Member] Precious Metals Pricing Risk [Member] Risks Of Personal Property Asset Companies [Member] Special Situation Transportation Assets Risks [Member] Cyclicality Of Supply And Demand For Transportation Assets Risk [Member] Risks Of Decline In Value Of Transportation Assets And Rental Values [Member] Technological Risks [Member] Risks Relating To Leases Of Transportation Assets [Member] Collectible Assets Risks [Member] Valuation Of Collectible Assets Risk [Member] Liquidity Of Collectible Assets Risk [Member] Authenticity Of Collectible Assets Risk [Member] High Transaction And Related Costs Risk [Member] Investment In The Subsidiary Risk [Member] Private Securities Risk [Member] Private Company Investments Risks [Member] Late Stage Private Companies Risk [Member] Investment Funds Risk [Member] Synthetic Investments Risk [Member] Inflation Or Deflation Risk [Member] Market Discount and Price Volatility Risk [Member] Dilution Risk [Member] Financial Leverage And Leveraged Transactions Risk [Member] Derivatives Transactions Risk [Member] Futures Transactions Risk [Member] Swap Risk [Member] Counterparty Risk [Member] Special Purpose Acquisition Companies Risk [Member] Availability And Quality Of Data [Member] Portfolio Turnover Risk [Member] U S Government Securities Risk [Member] Legislation And Regulation Risk [Member] Recent Market Developments Risk [Member] Increasing Government And Other Public Debt Risk [Member] Municipal Securities Risk [Member] When Issued And Delayed Delivery Transactions Risk [Member] Short Sales Risk [Member] Repurchase Agreement Risk [Member] Securities Lending Risk [Member] Failure To Qualify As R I C Risk [Member] Conflict Of Interest Risk [Member] Market Disruption And Geopolitical Risk [Member] Cyber Security Market Disruptions And Operational Risk [Member]