Other Assets Less Liabilities [Member] MSCI Emerging Markets Index Net [Member] C000198231 [Member] Class K C000103257 [Member] Investor C C000103256 [Member] Investor A C000103258 [Member] Institutional THAILAND SOUTH AFRICA MEXICO BRAZIL AUSTRALIA CANADA FRANCE GERMANY JAPAN NETHERLANDS SWEDEN SWITZERLAND UNITED KINGDOM C000121567 [Member] C000121568 [Member] C000121569 [Member] C000166017 [Member] MSCI World Index Net [Member] ICE BofA 3 Month U S Treasury Bill Index [Member] MSCI Emerging Markets Index C000223506 Net [Member] Bharti Airtel Ltd [Member] Samsung Electronics Co Ltd [Member] Ooredoo QPSC [Member] ASE Technology Holding Co Ltd [Member] Chroma ATE Inc [Member] PetroChina Co Ltd Class H [Member] Taiwan Semiconductor Manufacturing Co Ltd [Member] Delta Electronics Inc [Member] SK Hynix Inc [Member] Samsung Electro Mechanics Co Ltd [Member] Liabilities in Excess of Other Assets [Member] Other [Member] MSCI Emerging Markets Minimum Volatility Index Net [Member] C000223507 [Member] C000223508 [Member] C000223506 [Member] UNITED STATES UNITED ARAB EMIRATES TAIWAN SAUDI ARABIA QATAR MALAYSIA KUWAIT KOREA, REPUBLIC OF INDIA CHINA Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag