Financial Services Sector [Member] Healthcare Sector [Member] Energy Sector [Member] Real Estate Sector [Member] Short Term Investments and Other Net Assets [Member] C000174229 [Member] Class Z-2 C000025005 [Member] Class R C000179523 [Member] Class Y C000025004 [Member] Class I C000025002 [Member] C000025003 [Member] C000174228 [Member] C000172687 [Member] C000025001 [Member] C000025000 [Member] C000122071 [Member] Class A C000122072 [Member] Class C C000024998 [Member] C000179522 [Member] C000122073 [Member] Class Z Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag