General risk Common Shares [Member] Non-diversification risk Debt securities risk Credit Risk [Member] Prepayment or call risk Extension risk Risks relating to collateralized loan obligations Risks related to warehousing Risk Retention Vehicle risks Risks of holding a minority position Risk of limited transparency of investments Structured investments risk Risks of subordinated securities Floating rate instrument risks Risks of inverse floating rate obligations Below investment grade securities and unrated securities risk Leveraging risk Liquidity risk Valuation risk Market risk Regulatory risk Reinvestment risk Management and operational risk Repurchase offers risk Borrowing risk Expense risk Tax risk Private placement risk Mortgage-backed and asset-backed securities risk Mortgage market/subprime risk Corporate debt securities risk Risks of investing in securities backed by the U.S. Government Risks of non-U.S. investments Currency risk Defaulted securities risk Distressed investments Equity investing risk Small- and mid-capitalization companies risk Repurchase agreements risk Derivatives risk Cybersecurity risk Conflicts of interest risk Anti-takeover provisions