Money Market Funds Quality [Member] Non Fixed Income [Member] Not Rated [Member] Other Countries [Member] C000034483 [Member] Class R6 C000074227 [Member] Class R4 C000074226 [Member] Class R3 C000074225 [Member] Class R2 C000074224 [Member] Class R1 C000006903 [Member] Class I C000006902 [Member] Class C C000006901 [Member] Class B C000006900 [Member] Class A Fixed Income Securities [Member] US Government Debt Securities [Member] Equity [Member] Money Market Funds [Member] Fitch, CCC Rating [Member] Fitch, B Rating [Member] Fitch, BB Rating [Member] Fitch, BBB Rating [Member] Fitch, A Rating [Member] Fitch, AA Rating [Member] Moody's, C Rating [Member] UNITED STATES TÜRKIYE Turkey SAUDI ARABIA ROMANIA MEXICO INDIA COLOMBIA CHILE ARGENTINA Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag