PGIM National Muni Fund S000004518 [Member] A C000012414 [Member] C C000012416 [Member] Z C000012413 [Member] R6 C000195885 [Member] Bloomberg Municipal Bond Index[Member] Bloomberg 1-15 Year Municipal Index[Member] Alternative Minimum Tax Risk [Member] Credit Risk [Member] Debt Obligations Risk [Member] Economic And Market Events Risk [Member] Increase In Expenses Risk [Member] Insured Municipal Bonds Risk [Member] Interest Rate Risk [Member] Junk Bonds Risk [Member] Large Shareholder And Large Scale Redemption Risk [Member] Liquidity Risk [Member] Management Risk [Member] Market Disruption And Geopolitical Risks [Member] Market Risk [Member] Municipal Bonds Risk [Member]