PERU PHILIPPINES POLAND SINGAPORE SOUTH AFRICA TAIWAN TÜRKIYE TURKEY UNITED STATES ARGENTINA BRAZIL CHINA GREECE HUNGARY INDIA KOREA, REPUBLIC OF MEXICO Energy Sector [Member] Financial Services Sector [Member] Healthcare Sector [Member] Real Estate Sector [Member] Exchange Traded Funds [Member] Short Term Investments and Net Other Assets [Member] Short Term Investments Derivatives and Other Net Assets [Member] Market Indices [Member] Short Term Investments and Other Net Assets [Member] C000039961 [Member] Class A C000068369 [Member] Class C C000068370 [Member] Class I C000174226 [Member] Class Z C000024978 [Member] C000068367 [Member] C000068368 [Member] C000095102 [Member] Class Y C000206605 [Member] C000138115 [Member] C000095099 [Member] C000095100 [Member] C000095101 [Member] C000078761 [Member] C000098121 [Member] C000095104 [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag