Market Price Discount from Net Asset Value Risk [Member] Common Stock Risk [Member] Infrastructure Companies Risk [Member] Foreign Currency and Currency Hedging Risk [Member] Foreign Non U S and Emerging Market Securities Risk [Member] Master Limited Partnership Risk [Member] Leverage Risk [Member] Preferred Securities Risk [Member] Credit and Below Investment Grade Securities Risk [Member] Market Disruption and Geopolitical Risk [Member] Regulatory Risk [Member] Cybersecurity Risk [Member] Restricted and Illiquid Securities Risk [Member]