1001 - Disclosure - N-2 - [Senior Securities] link:presentationLink link:definitionLink link:calculationLink 1002 - Disclosure - N-2 - [Investment Objectives] link:presentationLink link:definitionLink link:calculationLink 1003 - Disclosure - N-2 - [Risk Factors] link:presentationLink link:definitionLink link:calculationLink 1004 - Disclosure - N-2 - [Effects of Leverage] link:presentationLink link:definitionLink link:calculationLink 1005 - Disclosure - N-2 - [Share Price Table] link:presentationLink link:definitionLink link:calculationLink 1006 - Disclosure - N-2 - [Outstanding Securities] link:presentationLink link:definitionLink link:calculationLink Additional Risks Associated with the Funds Preferred Shares [Member] AMT Bonds Risk [Member] AntiTakeover Provisions [Member] Anti-Takeover Provisions [Member] Asset Allocation Risk [Member] California StateSpecific Risk [Member] Call Risk [Member] Certain Affiliations [Member] Confidential Information Access Risk [Member] Counterparty Risk [Member] Credit Default Swaps Risk [Member] Credit Risks [Member] Cyber Security Risk [Member] Derivatives Risk [Member] Distribution Rate Risk [Member] Focused Investment Risk [Member] High Yield Securities Risk [Member] Illinois StateSpecific Risk [Member] InflationDeflation Risk [Member] Inflation/Deflation Risk [Member] InsuranceLinked and Other Instruments Risk [Member] Insurance-Linked and Other Instruments Risk [Member] Insurance Risk [Member] Issuer Risk [Member] Leverage Risk [Member] Liquidity Risk [Member] Loan Origination Risk [Member] Loans and Other Indebtedness Loan Acquisitions, Participations and Assignments Risk [Member] Management Risk [Member] Market Discount Risk [Member] Market Disruptions Risk [Member] Market Risk [Member] MortgageRelated and Other AssetBacked Instruments Risk [Member] Mortgage-Related and Other Asset-Backed Instruments Risk [Member] MortgageRelated Derivative Instruments Risk [Member] Mortgage-Related Derivative Instruments Risk [Member] Municipal Bond Risk [Member] Municipal Project HousingRelated Risk [Member] Municipal ProjectSpecific Risk [Member] New York StateSpecific Risk [Member] Operational Risk [Member] Other Investment Companies Risk [Member] Portfolio Turnover Risk [Member] Potential Conflicts of Interest Risk Allocation of Investment Opportunities [Member] Privacy and Data Security Risk [Member] Private Placements and Restricted Securities Risk [Member] Puerto RicoSpecific Risk [Member] Regulatory Changes Risk [Member] Regulatory Risk Commodity Pool Operator [Member] Reinvestment Risk [Member] Repurchase Agreements Risk [Member] Securities Lending Risk [Member] Series One [Member] Series 2053 [Member] Series Three [Member] Series 2054-A [Member] Series Two [Member] Series 2054 [Member] Short Exposure Risk [Member] Structured Investments Risk [Member] Tax Risk [Member] U.S. Government Securities Risk [Member] Valuation Risk [Member] ZeroCoupon Bond, StepUps and PaymentInKind Securities Risk [Member] Zero-Coupon Bond, Step-Ups and Payment-In-Kind Securities Risk [Member] ARPS [Member] Common Shares [Member] Preferred Shares [Member] RVMTP [Member]