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 - [Capital Stock] link:presentationLink link:definitionLink link:calculationLink 1006 - Disclosure - N-2 - [Long Term Debt] link:presentationLink link:definitionLink link:calculationLink 1007 - Disclosure - N-2 - [Outstanding Securities] link:presentationLink link:definitionLink link:calculationLink Common Shares [Member] Credit Facility [Member] Mandatory Redeemable Preferred Shares Series E [Member] Preferred Shares [Member] Investment and Market Risk [Member] Market Discount to Net Asset Value Risk [Member] At the Market Offering Risk [Member] At-the-Market Offering Risk [Member] Concentration Risk [Member] Utilities Industry Risk [Member] Leverage Risk [Member] Management Risk [Member] Common Stock Risk [Member] Small and MidCap Company Risk [Member] Small and Mid-Cap Company Risk [Member] Preferred Stock Risk [Member] MLP Risk [Member] Debt Securities Risk [Member] Illiquid Securities Risk [Member] Issuer Risk [Member] Credit Risk [Member] Income Risk [Member] High-Yield/High-Risk Fixed Income Securities (Junk Bonds) Risk [Member] Securities Lending Risk [Member] Counterparty Risk [Member] Foreign Investment Risk [Member] Foreign Currency Risk [Member] REIT and Real Estate Risk [Member] Convertible Securities Risk [Member] Reverse Repurchase Agreement Risk [Member] Hedging Strategy Risk [Member] Derivatives Risk [Member] Dividend Capture Risk [Member] Portfolio Turnover Risk [Member] Inflation Risk [Member] Market Disruption Risk [Member] Capital Market Risk [Member] Artificial Intelligence Risk [Member] Tax Risk [Member] MLP Tax Risk [Member] Cybersecurity Risk [Member] Certain Affiliations [Member] AntiTakeover Provisions [Member] Anti-Takeover Provisions [Member]