Advisor Class - C000033574 Advisor Class Class A - C000064524 Class A Class C - C000067641 Class C Class R - C000067642 Class R Class R6 - C000128792 Class R6 Advisor Class - C000067643 Advisor Class Broad Based Index:1C000033574-Bloomberg Global Aggregate Index_1[Member] Bloomberg Global Aggregate Index [Member] Additional Index:2C000033574-JP Morgan EMBI Global Diversified Index JP Morgan EMBI Global Diversified Index [Member] Additional Index:3C000033574-JP Morgan EMBI Global Diversified ex-GCC Index JP Morgan EMBI Global Diversified ex-GCC Index [Member] Additional Index:4C000033574-JP Morgan GBI-EM Broad Diversified Index JP Morgan GBI-EM Broad Diversified Index [Member] Additional Index:5C000033574-ICE BofA Emerging Market Corporate Plus (USD Hedged) Index ICE BofA Emerging Market Corporate Plus (USD Hedged) Index [Member] C000033574-Turkey Turkey C000033574-Brazil Brazil C000033574-Mexico Mexico C000033574-Venezuela Venezuela C000033574-Nigeria Nigeria C000033574-Argentina Argentina C000033574-Kazakhstan Kazakhstan C000033574-Colombia Colombia C000033574-South Africa South Africa C000033574-Ghana Ghana C000033574-Egypt Egypt C000033574-Ukraine Ukraine C000033574-Uzbekistan Uzbekistan C000033574-Angola Angola C000033574-Cote d Ivoire Cote d Ivoire C000033574-Dominican Republic Dominican Republic C000033574-Gabon Gabon C000033574-Ethiopia Ethiopia Other Category:24C000033574-Other_1 Other [Member] Other Category:25C000033574-Short-Term Investments_1 Short-Term Investments [Member] Broad Based Index:26C000064524-MSCI All Country World ex-U.S. Index-NR MSCI All Country World ex-U.S. Index-NR [Member] Additional Index:27C000064524-MSCI EAFE Index-NR MSCI EAFE Index-NR [Member] Other Category:29C000064524-Europe Europe [Member] Other Category:30C000064524-Asia Asia [Member] Other Category:31C000064524-North America North America [Member] Other Category:32C000064524-Middle East & Africa Middle East & Africa [Member] Other Category:33C000064524-Latin America & Caribbean Latin America & Caribbean [Member] Other Category:34C000064524-Short-Term Investments_1 Short-Term Investments [Member] Broad Based Index:35C000067641-MSCI All Country World ex-U.S. Index-NR MSCI All Country World ex-U.S. Index-NR [Member] Additional Index:36C000067641-MSCI EAFE Index-NR MSCI EAFE Index-NR [Member] Other Category:38C000067641-Europe Europe [Member] Other Category:39C000067641-Asia Asia [Member] Other Category:40C000067641-North America North America [Member] Other Category:41C000067641-Middle East & Africa Middle East & Africa [Member] Other Category:42C000067641-Latin America & Caribbean Latin America & Caribbean [Member] Other Category:43C000067641-Short-Term Investments_1 Short-Term Investments [Member] Broad Based Index:44C000067642-MSCI All Country World ex-U.S. Index-NR MSCI All Country World ex-U.S. Index-NR [Member] Additional Index:45C000067642-MSCI EAFE Index-NR MSCI EAFE Index-NR [Member] Other Category:46C000067642-Europe Europe [Member] Other Category:47C000067642-Asia Asia [Member] Other Category:48C000067642-North America North America [Member] Other Category:49C000067642-Middle East & Africa Middle East & Africa [Member] Other Category:50C000067642-Latin America & Caribbean Latin America & Caribbean [Member] Other Category:51C000067642-Short-Term Investments_1 Short-Term Investments [Member] Broad Based Index:52C000128792-MSCI All Country World ex-U.S. Index-NR MSCI All Country World ex-U.S. Index-NR [Member] Additional Index:53C000128792-MSCI EAFE Index-NR MSCI EAFE Index-NR [Member] Other Category:54C000128792-Europe Europe [Member] Other Category:55C000128792-Asia Asia [Member] Other Category:56C000128792-North America North America [Member] Other Category:57C000128792-Middle East & Africa Middle East & Africa [Member] Other Category:58C000128792-Latin America & Caribbean Latin America & Caribbean [Member] Other Category:59C000128792-Short-Term Investments_1 Short-Term Investments [Member] Broad Based Index:60C000067643-MSCI All Country World ex-U.S. Index-NR MSCI All Country World ex-U.S. Index-NR [Member] Additional Index:61C000067643-MSCI EAFE Index-NR MSCI EAFE Index-NR [Member] Other Category:62C000067643-Europe Europe [Member] Other Category:63C000067643-Asia Asia [Member] Other Category:64C000067643-North America North America [Member] Other Category:65C000067643-Middle East & Africa Middle East & Africa [Member] Other Category:66C000067643-Latin America & Caribbean Latin America & Caribbean [Member] Other Category:67C000067643-Short-Term Investments_1 Short-Term Investments [Member] Net Assets Investment Company Portfolio Turnover Portfolio Turnover Commodity Index Linked Notes [Member] Commodity Index Linked Notes Sovereign Debt Securities [Member] Sovereign Debt Securities Convertible Debt Securities [Member] Convertible Debt Securities Corporate Debt Securities [Member] Corporate Debt Securities Corporate Note Securities [Member] Corporate Note Securities Corporate Bond Securities [Member] Corporate Bond Securities Fixed Income Investments [Member] Fixed Income Investments Securities Investment [Member] Securities Investment Other Aggregated Investments [Member] Other Aggregated Investments Real Estate Sector [Member] Real Estate Sector Standard Poors 500 Index [Member] Standard Poors 500 Index Nasdaq Composite Index [Member] Nasdaq Composite Index Equity Securities Industry [Member] Equity Securities Industry Equity Securities [Member] Equity Securities Dow Jones Industrial Average [Member] Dow Jones Industrial Average Construction Sector [Member] Construction Sector Automotive Sector [Member] Automotive Sector Transportation Sector [Member] Transportation Sector Aerospace Sector [Member] Aerospace Sector Consumer Sector [Member] Consumer Sector Chemicals Sector [Member] Chemicals Sector Insurance Sector [Member] Insurance Sector Cash [Member] Cash Asset Backed Securities [Member] Asset Backed Securities Container And PackagingSector [Member] Container And PackagingSector Investment Type [Axis] Asset Class US Treasury Securities [Member] US Treasury Securities Mortgage Backed Securities [Member] Mortgage Backed Securities Investment Type Categorization [Member] Investment Type Categorization Entertainment Sector [Member] Entertainment Sector Food And Beverage Sector [Member] Food And Beverage Sector Financial Services Sector [Member] Financial Services Sector Healthcare Sector [Member] Healthcare Sector Energy Sector [Member] Energy Sector Technology Sector [Member] Technology Sector Government Sector [Member] Government Sector No Trading Symbol