v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000065302 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [1]
C000065302 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [1],[2]
C000065302 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [1]
C000065302 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [1]
C000065302 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [1]
C000065302 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [1]
C000065302 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [1]
C000065302 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [1]
C000065302 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [1]
C000065302 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [1]
C000065302 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [1]
C000065302 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [1]
C000065302 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [1]
C000065302 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [1]
C000065304 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [3]
C000065304 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [3],[4]
C000065304 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [3]
C000065304 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [3]
C000065304 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [3]
C000065304 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [3]
C000065304 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [3]
C000065304 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [3]
C000065304 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [3]
C000065304 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [3]
C000065304 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [3]
C000065304 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [3]
C000065304 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [3]
C000065304 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [3]
C000065306 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [5]
C000065306 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [5],[6]
C000065306 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [5]
C000065306 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [5]
C000065306 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [5]
C000065306 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [5]
C000065306 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [5]
C000065306 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [5]
C000065306 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [5]
C000065306 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [5]
C000065306 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [5]
C000065306 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [5]
C000065306 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [5]
C000065306 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [5]
C000065307 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [7]
C000065307 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [7],[8]
C000065307 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [7]
C000065307 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [7]
C000065307 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [7]
C000065307 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [7]
C000065307 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [7]
C000065307 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [7]
C000065307 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [7]
C000065307 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [7]
C000065307 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [7]
C000065307 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [7]
C000065307 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [7]
C000065307 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [7]
C000065308 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [9]
C000065308 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [9],[10]
C000065308 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [9]
C000065308 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [9]
C000065308 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [9]
C000065308 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [9]
C000065308 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [9]
C000065308 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [9]
C000065308 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [9]
C000065308 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [9]
C000065308 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [9]
C000065308 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [9]
C000065308 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [9]
C000065308 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [9]
C000065309 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [11]
C000065309 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [11],[12]
C000065309 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [11]
C000065309 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [11]
C000065309 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [11]
C000065309 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [11]
C000065309 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [11]
C000065309 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [11]
C000065309 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [11]
C000065309 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [11]
C000065309 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [11]
C000065309 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [11]
C000065309 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [11]
C000065309 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [11]
C000200567 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [13]
C000200567 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [13],[14]
C000200567 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [13]
C000200567 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [13]
C000200567 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [13]
C000200567 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [13]
C000200567 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [13]
C000200567 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [13]
C000200567 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [13]
C000200567 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [13]
C000200567 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [13]
C000200567 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [13]
C000200567 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [13]
C000200567 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [13]
C000065305 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [15]
C000065305 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [15],[16]
C000065305 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [15]
C000065305 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [15]
C000065305 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [15]
C000065305 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [15]
C000065305 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [15]
C000065305 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [15]
C000065305 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [15]
C000065305 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [15]
C000065305 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [15]
C000065305 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [15]
C000065305 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [15]
C000065305 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [15]
C000185747 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [17]
C000185747 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.80% [17],[18]
C000185747 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [17]
C000185747 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [17]
C000185747 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [17]
C000185747 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [17]
C000185747 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [17]
C000185747 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [17]
C000185747 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [17]
C000185747 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [17]
C000185747 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [17]
C000185747 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.30% [17]
C000185747 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [17]
C000185747 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.50%) [17]
C000089180 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [19]
C000089180 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [19],[20]
C000089180 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [19]
C000089180 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [19]
C000089180 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [19]
C000089180 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [19]
C000089180 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [19]
C000089180 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [19]
C000089180 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [19]
C000089180 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [19]
C000089180 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [19]
C000089180 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [19]
C000089180 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [19]
C000089180 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [19]
C000089181 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [21]
C000089181 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [21],[22]
C000089181 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [21]
C000089181 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [21]
C000089181 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [21]
C000089181 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [21]
C000089181 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [21]
C000089181 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [21]
C000089181 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [21]
C000089181 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [21]
C000089181 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [21]
C000089181 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [21]
C000089181 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [21]
C000089181 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [21]
C000089182 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [23]
C000089182 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [23],[24]
C000089182 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [23]
C000089182 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [23]
C000089182 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [23]
C000089182 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [23]
C000089182 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [23]
C000089182 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [23]
C000089182 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [23]
C000089182 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [23]
C000089182 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [23]
C000089182 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [23]
C000089182 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [23]
C000089182 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [23]
C000089183 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [25]
C000089183 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [25],[26]
C000089183 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [25]
C000089183 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [25]
C000089183 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [25]
C000089183 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [25]
C000089183 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [25]
C000089183 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [25]
C000089183 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [25]
C000089183 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [25]
C000089183 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [25]
C000089183 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [25]
C000089183 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [25]
C000089183 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [25]
C000010045 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010045 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000010045 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010045 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000010045 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000010045 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000010045 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000010045 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [27]
C000010045 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000010045 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [28]
C000010045 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [28]
C000185727 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185727 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000185727 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185727 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185727 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000185727 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000185727 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000185727 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [29]
C000185727 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000185727 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [30]
C000185727 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [30]
C000048995 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048995 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000048995 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048995 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000048995 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000048995 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000048995 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048995 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000048995 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048995 [Member] | COLORADO  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000048995 [Member] | FLORIDA  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000048995 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000048995 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000048995 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30% [31]
C000048995 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000048997 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048997 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000048997 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048997 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000048997 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000048997 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000048997 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048997 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000048997 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048997 [Member] | COLORADO  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000048997 [Member] | FLORIDA  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000048997 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000048997 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000048997 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30% [32]
C000048997 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000048998 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048998 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000048998 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048998 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000048998 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000048998 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000048998 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048998 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000048998 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048998 [Member] | COLORADO  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000048998 [Member] | FLORIDA  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000048998 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000048998 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000048998 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30% [33]
C000048998 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000200566 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000200566 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000200566 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200566 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000200566 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000200566 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000200566 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000200566 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000200566 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000200566 [Member] | COLORADO  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000200566 [Member] | FLORIDA  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000200566 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000200566 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000200566 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30% [34]
C000200566 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185741 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185741 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000185741 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185741 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000185741 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.40%
C000185741 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000185741 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000185741 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 8.40%
C000185741 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000185741 [Member] | COLORADO  
Holdings [Line Items]  
Percent of Net Asset Value 2.90%
C000185741 [Member] | FLORIDA  
Holdings [Line Items]  
Percent of Net Asset Value 4.40%
C000185741 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185741 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000185741 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.30% [35]
C000185741 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000049001 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000049001 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000049001 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000049001 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [36]
C000049001 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000049001 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000049001 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000049001 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000049001 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [37]
C000049001 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000049001 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000049001 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [36]
C000049001 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000049001 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000049001 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000049001 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [36]
C000048999 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048999 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000048999 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000048999 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [38]
C000048999 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048999 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000048999 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000048999 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000048999 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [39]
C000048999 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000048999 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000048999 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [38]
C000048999 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000048999 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000048999 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000048999 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [38]
C000185743 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185743 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000185743 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000185743 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [40]
C000185743 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000185743 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000185743 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000185743 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000185743 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [41]
C000185743 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000185743 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000185743 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [40]
C000185743 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000185743 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185743 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000185743 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [40]
C000052097 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000052097 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000052097 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000052097 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [42]
C000052097 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000052097 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000052097 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000052097 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000052097 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [43]
C000052097 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000052097 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000052097 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [42]
C000052097 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000052097 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000052097 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000052097 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [42]
C000105495 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105495 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000105495 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000105495 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [44]
C000105495 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000105495 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000105495 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000105495 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000105495 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [45]
C000105495 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000105495 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000105495 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [44]
C000105495 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000105495 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105495 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105495 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [44]
C000148300 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000148300 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000148300 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000148300 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [46]
C000148300 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000148300 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000148300 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000148300 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000148300 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [47]
C000148300 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000148300 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000148300 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [46]
C000148300 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000148300 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000148300 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000148300 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [46]
C000049000 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000049000 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000049000 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000049000 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [48]
C000049000 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000049000 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000049000 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000049000 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000049000 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [49]
C000049000 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000049000 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000049000 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [48]
C000049000 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000049000 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000049000 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000049000 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [48]
C000105493 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105493 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000105493 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000105493 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [50]
C000105493 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000105493 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000105493 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000105493 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000105493 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [51]
C000105493 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000105493 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000105493 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [50]
C000105493 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000105493 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105493 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105493 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [50]
C000105494 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105494 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000105494 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000105494 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [52]
C000105494 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000105494 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (14.80%)
C000105494 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10%
C000105494 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80%
C000105494 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.80% [53]
C000105494 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.90%
C000105494 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000105494 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [52]
C000105494 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000105494 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105494 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105494 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [52]
C000185705 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185705 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000185705 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000185705 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185705 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000185705 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000185705 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000185705 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [54]
C000185705 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000185705 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000040953 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040953 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040953 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000040953 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040953 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000040953 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000040953 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000040953 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [55]
C000040953 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040953 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000009964 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009964 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009964 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000009964 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009964 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000009964 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000009964 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000009964 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [56]
C000009964 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009964 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000009965 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [57]
C000009965 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [57],[58]
C000009965 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [57]
C000009965 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [57]
C000009965 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [57]
C000009965 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [57]
C000009965 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [57]
C000009965 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [57]
C000009965 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [57]
C000009965 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [57]
C000009965 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [57]
C000009965 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [57]
C000009965 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [57]
C000009965 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [57]
C000009967 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [59]
C000009967 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [59],[60]
C000009967 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [59]
C000009967 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [59]
C000009967 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [59]
C000009967 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [59]
C000009967 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [59]
C000009967 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [59]
C000009967 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [59]
C000009967 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [59]
C000009967 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [59]
C000009967 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [59]
C000009967 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [59]
C000009967 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [59]
C000035175 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [61]
C000035175 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [61],[62]
C000035175 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [61]
C000035175 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [61]
C000035175 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [61]
C000035175 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [61]
C000035175 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [61]
C000035175 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [61]
C000035175 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [61]
C000035175 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [61]
C000035175 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [61]
C000035175 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [61]
C000035175 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [61]
C000035175 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [61]
C000040954 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [63]
C000040954 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [63],[64]
C000040954 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [63]
C000040954 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [63]
C000040954 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [63]
C000040954 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [63]
C000040954 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [63]
C000040954 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [63]
C000040954 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [63]
C000040954 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [63]
C000040954 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [63]
C000040954 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [63]
C000040954 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [63]
C000040954 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [63]
C000185707 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [65]
C000185707 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [65],[66]
C000185707 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [65]
C000185707 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [65]
C000185707 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [65]
C000185707 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [65]
C000185707 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [65]
C000185707 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [65]
C000185707 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [65]
C000185707 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [65]
C000185707 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [65]
C000185707 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [65]
C000185707 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [65]
C000185707 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [65]
C000009968 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [67]
C000009968 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [67],[68]
C000009968 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [67]
C000009968 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [67]
C000009968 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [67]
C000009968 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [67]
C000009968 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [67]
C000009968 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [67]
C000009968 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [67]
C000009968 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [67]
C000009968 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [67]
C000009968 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [67]
C000009968 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [67]
C000009968 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [67]
C000040955 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [69]
C000040955 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [69],[70]
C000040955 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [69]
C000040955 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [69]
C000040955 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [69]
C000040955 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [69]
C000040955 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [69]
C000040955 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [69]
C000040955 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [69]
C000040955 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [69]
C000040955 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [69]
C000040955 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [69]
C000040955 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [69]
C000040955 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [69]
C000040956 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [71]
C000040956 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [71],[72]
C000040956 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [71]
C000040956 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [71]
C000040956 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [71]
C000040956 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [71]
C000040956 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [71]
C000040956 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [71]
C000040956 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [71]
C000040956 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [71]
C000040956 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [71]
C000040956 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [71]
C000040956 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [71]
C000040956 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [71]
C000200564 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [73]
C000200564 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90% [73],[74]
C000200564 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.20% [73]
C000200564 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [73]
C000200564 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [73]
C000200564 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [73]
C000200564 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.10% [73]
C000200564 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.10% [73]
C000200564 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.10% [73]
C000200564 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [73]
C000200564 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [73]
C000200564 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [73]
C000200564 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.40% [73]
C000200564 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.10%) [73]
C000009969 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [75]
C000009969 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [75],[76]
C000009969 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [75]
C000009969 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [75]
C000009969 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [75]
C000009969 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [75]
C000009969 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [75]
C000009969 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [75]
C000009969 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [75]
C000009969 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [75]
C000009969 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [75]
C000009969 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [75]
C000009969 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [75]
C000009969 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [75]
C000009971 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [77]
C000009971 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [77],[78]
C000009971 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [77]
C000009971 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [77]
C000009971 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [77]
C000009971 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [77]
C000009971 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [77]
C000009971 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [77]
C000009971 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [77]
C000009971 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [77]
C000009971 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [77]
C000009971 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [77]
C000009971 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [77]
C000009971 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [77]
C000064694 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [79]
C000064694 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [79],[80]
C000064694 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [79]
C000064694 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [79]
C000064694 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [79]
C000064694 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [79]
C000064694 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [79]
C000064694 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [79]
C000064694 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [79]
C000064694 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [79]
C000064694 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [79]
C000064694 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [79]
C000064694 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [79]
C000064694 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [79]
C000040957 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [81]
C000040957 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [81],[82]
C000040957 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [81]
C000040957 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [81]
C000040957 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [81]
C000040957 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [81]
C000040957 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [81]
C000040957 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [81]
C000040957 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [81]
C000040957 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [81]
C000040957 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [81]
C000040957 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [81]
C000040957 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [81]
C000040957 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [81]
C000040958 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [83]
C000040958 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [83],[84]
C000040958 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [83]
C000040958 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [83]
C000040958 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [83]
C000040958 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [83]
C000040958 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [83]
C000040958 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [83]
C000040958 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [83]
C000040958 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [83]
C000040958 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [83]
C000040958 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [83]
C000040958 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [83]
C000040958 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [83]
C000040959 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [85]
C000040959 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [85],[86]
C000040959 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [85]
C000040959 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [85]
C000040959 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [85]
C000040959 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [85]
C000040959 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [85]
C000040959 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [85]
C000040959 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [85]
C000040959 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [85]
C000040959 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [85]
C000040959 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [85]
C000040959 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [85]
C000040959 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [85]
C000148292 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [87]
C000148292 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [87],[88]
C000148292 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [87]
C000148292 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [87]
C000148292 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [87]
C000148292 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [87]
C000148292 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [87]
C000148292 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [87]
C000148292 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [87]
C000148292 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [87]
C000148292 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [87]
C000148292 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [87]
C000148292 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [87]
C000148292 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [87]
C000009972 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [89]
C000009972 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [89],[90]
C000009972 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [89]
C000009972 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [89]
C000009972 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [89]
C000009972 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [89]
C000009972 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [89]
C000009972 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [89]
C000009972 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [89]
C000009972 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [89]
C000009972 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [89]
C000009972 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [89]
C000009972 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [89]
C000009972 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [89]
C000185709 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [91]
C000185709 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.20% [91],[92]
C000185709 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 7.30% [91]
C000185709 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [91]
C000185709 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [91]
C000185709 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [91]
C000185709 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [91]
C000185709 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 11.90% [91]
C000185709 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.90% [91]
C000185709 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [91]
C000185709 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 5.70% [91]
C000185709 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [91]
C000185709 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [91]
C000185709 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [91]
C000010008 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010008 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000010008 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000010008 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000010008 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010008 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000010008 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000010008 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000010008 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [93]
C000010008 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000010010 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010010 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000010010 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000010010 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000010010 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010010 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000010010 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000010010 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000010010 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [94]
C000010010 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000085295 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000085295 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000085295 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000085295 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000085295 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000085295 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000085295 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000085295 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000085295 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [95]
C000085295 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000105490 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105490 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000105490 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000105490 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000105490 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105490 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000105490 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105490 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000105490 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [96]
C000105490 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000185721 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185721 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000185721 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000185721 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000185721 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185721 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000185721 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185721 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000185721 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [97]
C000185721 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000010011 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010011 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000010011 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000010011 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000010011 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010011 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000010011 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000010011 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000010011 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [98]
C000010011 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000105491 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105491 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000105491 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000105491 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000105491 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105491 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000105491 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105491 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000105491 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [99]
C000105491 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000105492 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105492 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000105492 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000105492 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000105492 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105492 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000105492 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105492 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000105492 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [100]
C000105492 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000211747 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000211747 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000211747 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.30%
C000211747 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000211747 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000211747 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000211747 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000211747 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000211747 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.30% [101]
C000211747 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 37.10%
C000040987 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040987 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000040987 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040987 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040987 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000040987 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000040987 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000040987 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [102]
C000040987 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000040987 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [103]
C000040987 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [103]
C000040988 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040988 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000040988 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040988 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040988 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000040988 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000040988 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000040988 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [104]
C000040988 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000040988 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [105]
C000040988 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [105]
C000040989 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040989 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000040989 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040989 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040989 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000040989 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000040989 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000040989 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [106]
C000040989 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000040989 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [107]
C000040989 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [107]
C000148296 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000148296 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000148296 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000148296 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000148296 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000148296 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000148296 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000148296 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [108]
C000148296 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000148296 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [109]
C000148296 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [109]
C000010044 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010044 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000010044 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010044 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000010044 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000010044 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000010044 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000010044 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [110]
C000010044 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000010044 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [111]
C000010044 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [111]
C000035179 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000035179 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000035179 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000035179 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000035179 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000035179 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000035179 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000035179 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [112]
C000035179 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000035179 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [113]
C000035179 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [113]
C000010042 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010042 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.70%
C000010042 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010042 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000010042 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (15.60%)
C000010042 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000010042 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 32.50%
C000010042 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 40.80% [114]
C000010042 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.50%
C000010042 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [115]
C000010042 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [115]
C000009947 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009947 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009947 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000009947 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000009947 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000009947 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000009947 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009947 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000185695 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185695 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000185695 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000185695 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000185695 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185695 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000185695 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000185695 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040932 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040932 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000040932 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000040932 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000040932 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040932 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040932 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000040932 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009919 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009919 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000009919 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000009919 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000009919 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009919 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009919 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000009919 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009949 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009949 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009949 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000009949 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000009949 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000009949 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000009949 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009949 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000049003 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000049003 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000049003 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000049003 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000049003 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000049003 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000049003 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000049003 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000040942 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040942 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040942 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000040942 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000040942 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000040942 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000040942 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040942 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000040943 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040943 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040943 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000040943 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000040943 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000040943 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000040943 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040943 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000040944 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040944 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040944 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000040944 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000040944 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000040944 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000040944 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040944 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000227371 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000227371 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000227371 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000227371 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000227371 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000227371 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000227371 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000227371 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000009950 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009950 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009950 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000009950 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000009950 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000009950 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000009950 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009950 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000185702 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185702 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000185702 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000185702 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000185702 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 89.00%
C000185702 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000185702 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000185702 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30%
C000009961 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009961 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009961 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000009961 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009961 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000009961 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000009961 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000009961 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [116]
C000009961 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009961 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000009963 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009963 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000009963 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000009963 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009963 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000009963 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000009963 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000009963 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [117]
C000009963 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000009963 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000035174 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000035174 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000035174 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000035174 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000035174 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000035174 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000035174 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000035174 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [118]
C000035174 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000035174 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000040951 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040951 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040951 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000040951 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040951 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000040951 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000040951 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000040951 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [119]
C000040951 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040951 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000040952 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040952 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000040952 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.60%
C000040952 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040952 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50%
C000040952 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.80%
C000040952 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 72.10%
C000040952 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10% [120]
C000040952 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000040952 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.30%
C000009916 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009916 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000009916 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000009916 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000009916 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009916 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009916 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000009916 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009918 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000009918 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000009918 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000009918 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000009918 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009918 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009918 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000009918 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000035169 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000035169 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000035169 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000035169 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000035169 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000035169 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000035169 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000035169 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040930 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040930 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000040930 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000040930 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000040930 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040930 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040930 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000040930 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040931 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040931 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 86.50%
C000040931 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000040931 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000040931 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040931 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040931 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000040931 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000166660 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [121]
C000166660 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [121]
C000166660 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [121]
C000166660 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [121]
C000166660 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [121]
C000166660 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [121]
C000166660 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [121]
C000166660 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [121]
C000166660 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [121]
C000166660 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [121]
C000166660 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [121]
C000166660 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [121]
C000166661 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [122]
C000166661 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [122]
C000166661 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [122]
C000166661 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [122]
C000166661 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [122]
C000166661 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [122]
C000166661 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [122]
C000166661 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [122]
C000166661 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [122]
C000166661 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [122]
C000166661 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [122]
C000166661 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [122]
C000166662 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [123]
C000166662 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [123]
C000166662 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [123]
C000166662 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [123]
C000166662 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [123]
C000166662 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [123]
C000166662 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [123]
C000166662 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [123]
C000166662 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [123]
C000166662 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [123]
C000166662 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [123]
C000166662 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [123]
C000166663 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [124]
C000166663 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [124]
C000166663 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [124]
C000166663 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [124]
C000166663 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [124]
C000166663 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [124]
C000166663 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [124]
C000166663 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [124]
C000166663 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [124]
C000166663 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [124]
C000166663 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [124]
C000166663 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [124]
C000166664 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [125]
C000166664 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [125]
C000166664 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [125]
C000166664 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [125]
C000166664 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [125]
C000166664 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [125]
C000166664 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [125]
C000166664 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [125]
C000166664 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [125]
C000166664 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [125]
C000166664 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [125]
C000166664 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [125]
C000166665 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [126]
C000166665 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [126]
C000166665 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [126]
C000166665 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [126]
C000166665 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [126]
C000166665 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [126]
C000166665 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [126]
C000166665 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [126]
C000166665 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [126]
C000166665 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [126]
C000166665 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [126]
C000166665 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [126]
C000166666 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [127]
C000166666 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [127]
C000166666 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [127]
C000166666 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [127]
C000166666 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [127]
C000166666 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [127]
C000166666 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [127]
C000166666 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [127]
C000166666 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [127]
C000166666 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [127]
C000166666 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [127]
C000166666 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [127]
C000166667 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [128]
C000166667 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [128]
C000166667 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [128]
C000166667 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [128]
C000166667 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [128]
C000166667 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [128]
C000166667 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [128]
C000166667 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [128]
C000166667 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [128]
C000166667 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [128]
C000166667 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [128]
C000166667 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [128]
C000185775 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [129]
C000185775 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [129]
C000185775 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [129]
C000185775 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.10% [129]
C000185775 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [129]
C000185775 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [129]
C000185775 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.20% [129]
C000185775 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [129]
C000185775 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 42.70% [129]
C000185775 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.90% [129]
C000185775 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30% [129]
C000185775 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [129]
C000175596 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [130]
C000175596 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [130]
C000175596 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [130]
C000175596 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [130]
C000175596 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [130]
C000175596 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [130]
C000175596 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [130]
C000175596 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [130]
C000175596 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [130]
C000175596 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [130]
C000175596 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [130]
C000175596 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [130]
C000175597 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [131]
C000175597 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [131]
C000175597 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [131]
C000175597 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [131]
C000175597 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [131]
C000175597 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [131]
C000175597 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [131]
C000175597 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [131]
C000175597 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [131]
C000175597 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [131]
C000175597 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [131]
C000175597 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [131]
C000175598 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [132]
C000175598 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [132]
C000175598 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [132]
C000175598 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [132]
C000175598 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [132]
C000175598 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [132]
C000175598 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [132]
C000175598 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [132]
C000175598 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [132]
C000175598 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [132]
C000175598 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [132]
C000175598 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [132]
C000175599 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [133]
C000175599 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [133]
C000175599 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [133]
C000175599 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [133]
C000175599 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [133]
C000175599 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [133]
C000175599 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [133]
C000175599 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [133]
C000175599 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [133]
C000175599 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [133]
C000175599 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [133]
C000175599 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [133]
C000175600 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [134]
C000175600 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [134]
C000175600 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [134]
C000175600 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [134]
C000175600 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [134]
C000175600 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [134]
C000175600 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [134]
C000175600 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [134]
C000175600 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [134]
C000175600 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [134]
C000175600 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [134]
C000175600 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [134]
C000175601 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [135]
C000175601 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [135]
C000175601 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [135]
C000175601 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [135]
C000175601 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [135]
C000175601 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [135]
C000175601 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [135]
C000175601 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [135]
C000175601 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [135]
C000175601 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [135]
C000175601 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [135]
C000175601 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [135]
C000156246 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156246 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156246 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000156246 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000156246 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156246 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156246 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000156246 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000156246 [Member] | SOUTH CAROLINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156246 [Member] | LOUISIANA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000156246 [Member] | MASSACHUSETTS  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156246 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000156246 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000156246 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.60% [136]
C000156246 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000185761 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185761 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000185761 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000185761 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000185761 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000185761 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [137]
C000185761 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [138]
C000185761 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000185761 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185761 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [137]
C000156247 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156247 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156247 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000156247 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000156247 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156247 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156247 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000156247 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000156247 [Member] | SOUTH CAROLINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156247 [Member] | LOUISIANA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000156247 [Member] | MASSACHUSETTS  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156247 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000156247 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000156247 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.60% [139]
C000156247 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000156248 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156248 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156248 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000156248 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000156248 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156248 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156248 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000156248 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000156248 [Member] | SOUTH CAROLINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156248 [Member] | LOUISIANA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000156248 [Member] | MASSACHUSETTS  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156248 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000156248 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000156248 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.60% [140]
C000156248 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000185771 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185771 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000185771 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 6.30%
C000185771 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.50%
C000185771 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000185771 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000185771 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.60%
C000185771 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.80%
C000185771 [Member] | SOUTH CAROLINA  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000185771 [Member] | LOUISIANA  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000185771 [Member] | MASSACHUSETTS  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000185771 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000185771 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40%
C000185771 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 38.60% [141]
C000185771 [Member] | Other Non Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000105109 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105109 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105109 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105109 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105109 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105109 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [142]
C000105109 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [143]
C000105109 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105109 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105109 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [142]
C000105108 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105108 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105108 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105108 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105108 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105108 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [144]
C000105108 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [145]
C000105108 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105108 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105108 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [144]
C000105107 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105107 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105107 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105107 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105107 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105107 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [146]
C000105107 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [147]
C000105107 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105107 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105107 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [146]
C000105104 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105104 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105104 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105104 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105104 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105104 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [148]
C000105104 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [149]
C000105104 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105104 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105104 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [148]
C000105103 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105103 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105103 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105103 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105103 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105103 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [150]
C000105103 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [151]
C000105103 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105103 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105103 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [150]
C000105105 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105105 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105105 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105105 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105105 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105105 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [152]
C000105105 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [153]
C000105105 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105105 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105105 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [152]
C000105106 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000105106 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50%
C000105106 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 46.20%
C000105106 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000105106 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.20%
C000105106 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [154]
C000105106 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.90% [155]
C000105106 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 27.80%
C000105106 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105106 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [154]
C000156249 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156249 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000156249 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156249 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156249 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000156249 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000156249 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000156249 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156249 [Member] | OHIO  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000156249 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000156249 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000156249 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000156249 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000156249 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.10% [156]
C000156250 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156250 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000156250 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156250 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156250 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000156250 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000156250 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000156250 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156250 [Member] | OHIO  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000156250 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000156250 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000156250 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000156250 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000156250 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.10% [157]
C000185773 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185773 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000185773 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000185773 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000185773 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000185773 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000185773 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000185773 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000185773 [Member] | OHIO  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000185773 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000185773 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000185773 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000185773 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000185773 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.10% [158]
C000156251 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156251 [Member] | California Country [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000156251 [Member] | PENNSYLVANIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156251 [Member] | GEORGIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156251 [Member] | ILLINOIS  
Holdings [Line Items]  
Percent of Net Asset Value 10.10%
C000156251 [Member] | TEXAS  
Holdings [Line Items]  
Percent of Net Asset Value 11.00%
C000156251 [Member] | WISCONSIN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70%
C000156251 [Member] | RHODE ISLAND  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000156251 [Member] | OHIO  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000156251 [Member] | ALABAMA  
Holdings [Line Items]  
Percent of Net Asset Value 10.70%
C000156251 [Member] | NEW YORK  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000156251 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000156251 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.60%
C000156251 [Member] | Other Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.10% [159]
C000101264 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [160]
C000101264 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [160],[161]
C000101264 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [160]
C000101264 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [160]
C000101264 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [160]
C000101264 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [160]
C000101264 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [160]
C000101264 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [160]
C000101264 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [160]
C000101264 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [160]
C000101264 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [160]
C000101264 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [160]
C000101264 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [160]
C000101264 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [160]
C000200569 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [162]
C000200569 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [162],[163]
C000200569 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [162]
C000200569 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [162]
C000200569 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [162]
C000200569 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [162]
C000200569 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [162]
C000200569 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [162]
C000200569 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [162]
C000200569 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [162]
C000200569 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [162]
C000200569 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [162]
C000200569 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [162]
C000200569 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [162]
C000101265 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [164]
C000101265 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [164],[165]
C000101265 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [164]
C000101265 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [164]
C000101265 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [164]
C000101265 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [164]
C000101265 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [164]
C000101265 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [164]
C000101265 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [164]
C000101265 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [164]
C000101265 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [164]
C000101265 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [164]
C000101265 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [164]
C000101265 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [164]
C000185757 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [166]
C000185757 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [166],[167]
C000185757 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [166]
C000185757 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [166]
C000185757 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [166]
C000185757 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [166]
C000185757 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [166]
C000185757 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [166]
C000185757 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [166]
C000185757 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [166]
C000185757 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [166]
C000185757 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [166]
C000185757 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [166]
C000185757 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [166]
C000101268 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101268 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101268 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101268 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101268 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101268 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101268 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101268 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [168]
C000101268 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101268 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101268 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101268 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [169]
C000101268 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [169]
C000101269 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101269 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101269 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101269 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101269 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101269 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101269 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101269 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [170]
C000101269 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101269 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101269 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101269 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [171]
C000101269 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [171]
C000101270 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101270 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101270 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101270 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101270 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101270 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101270 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101270 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [172]
C000101270 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101270 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101270 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101270 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [173]
C000101270 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [173]
C000101271 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101271 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101271 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101271 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101271 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101271 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101271 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101271 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [174]
C000101271 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101271 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101271 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101271 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [175]
C000101271 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [175]
C000101272 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101272 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101272 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101272 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101272 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101272 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101272 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101272 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [176]
C000101272 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101272 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101272 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101272 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [177]
C000101272 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [177]
C000185759 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185759 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000185759 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000185759 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000185759 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000185759 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000185759 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000185759 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [178]
C000185759 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000185759 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185759 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000185759 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [179]
C000185759 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [179]
C000101273 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101273 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101273 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101273 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101273 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101273 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101273 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101273 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [180]
C000101273 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101273 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101273 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101273 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [181]
C000101273 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [181]
C000148301 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000148301 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000148301 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000148301 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000148301 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000148301 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000148301 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000148301 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [182]
C000148301 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000148301 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000148301 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000148301 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [183]
C000148301 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [183]
C000101274 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101274 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000101274 [Member] | Asset Backed And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.30%
C000101274 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.50%
C000101274 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (1.20%)
C000101274 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 64.00%
C000101274 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60%
C000101274 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [184]
C000101274 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 15.10%
C000101274 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101274 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000101274 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [185]
C000101274 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [185]
C000101254 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101254 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101254 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101254 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101254 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101254 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101254 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185753 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [186]
C000185753 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [186],[187]
C000185753 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [186]
C000185753 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [186]
C000185753 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [186]
C000185753 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [186]
C000185753 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [186]
C000185753 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [186]
C000185753 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [186]
C000185753 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [186]
C000185753 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [186]
C000185753 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [186]
C000185753 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [186]
C000185753 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [186]
C000089184 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [188]
C000089184 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [188],[189]
C000089184 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [188]
C000089184 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [188]
C000089184 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [188]
C000089184 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [188]
C000089184 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [188]
C000089184 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [188]
C000089184 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [188]
C000089184 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [188]
C000089184 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [188]
C000089184 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [188]
C000089184 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [188]
C000089184 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [188]
C000089185 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [190]
C000089185 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [190],[191]
C000089185 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [190]
C000089185 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [190]
C000089185 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [190]
C000089185 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [190]
C000089185 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [190]
C000089185 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [190]
C000089185 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [190]
C000089185 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [190]
C000089185 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [190]
C000089185 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [190]
C000089185 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [190]
C000089185 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [190]
C000211748 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [192]
C000211748 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [192],[193]
C000211748 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [192]
C000211748 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [192]
C000211748 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [192]
C000211748 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [192]
C000211748 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [192]
C000211748 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [192]
C000211748 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [192]
C000211748 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [192]
C000211748 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [192]
C000211748 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [192]
C000211748 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [192]
C000211748 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [192]
C000089186 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [194]
C000089186 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [194],[195]
C000089186 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.20% [194]
C000089186 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [194]
C000089186 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.50% [194]
C000089186 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 5.50% [194]
C000089186 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 14.00% [194]
C000089186 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [194]
C000089186 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 18.80% [194]
C000089186 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 13.00% [194]
C000089186 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [194]
C000089186 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 3.80% [194]
C000089186 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [194]
C000089186 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [194]
C000101255 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101255 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101255 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101255 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101255 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101255 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101255 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101256 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101256 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101256 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101256 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101256 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101256 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101256 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101257 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101257 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101257 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101257 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101257 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101257 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101257 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101258 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101258 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101258 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101258 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101258 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101258 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101258 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101259 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101259 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101259 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101259 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101259 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101259 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101259 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101260 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101260 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000101260 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000101260 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000101260 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000101260 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101260 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185755 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185755 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000185755 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90%
C000185755 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.40%
C000185755 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.60%
C000185755 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000185755 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000101266 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [196]
C000101266 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [196],[197]
C000101266 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [196]
C000101266 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [196]
C000101266 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [196]
C000101266 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [196]
C000101266 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [196]
C000101266 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [196]
C000101266 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [196]
C000101266 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [196]
C000101266 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [196]
C000101266 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [196]
C000101266 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [196]
C000101266 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [196]
C000101267 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [198]
C000101267 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [198],[199]
C000101267 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [198]
C000101267 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [198]
C000101267 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [198]
C000101267 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [198]
C000101267 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [198]
C000101267 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [198]
C000101267 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [198]
C000101267 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [198]
C000101267 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [198]
C000101267 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [198]
C000101267 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [198]
C000101267 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [198]
C000101261 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [200]
C000101261 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [200],[201]
C000101261 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [200]
C000101261 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [200]
C000101261 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [200]
C000101261 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [200]
C000101261 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [200]
C000101261 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [200]
C000101261 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [200]
C000101261 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [200]
C000101261 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [200]
C000101261 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [200]
C000101261 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [200]
C000101261 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [200]
C000101262 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [202]
C000101262 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [202],[203]
C000101262 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [202]
C000101262 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [202]
C000101262 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [202]
C000101262 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [202]
C000101262 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [202]
C000101262 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [202]
C000101262 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [202]
C000101262 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [202]
C000101262 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [202]
C000101262 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [202]
C000101262 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [202]
C000101262 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [202]
C000101263 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [204]
C000101263 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [204],[205]
C000101263 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.70% [204]
C000101263 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 1.80% [204]
C000101263 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [204]
C000101263 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 24.10% [204]
C000101263 [Member] | HUNGARY  
Holdings [Line Items]  
Percent of Net Asset Value 1.60% [204]
C000101263 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [204]
C000101263 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 19.20% [204]
C000101263 [Member] | MALAYSIA  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [204]
C000101263 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 23.70% [204]
C000101263 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.40% [204]
C000101263 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80% [204]
C000101263 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [204]
C000185166 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [206]
C000185166 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [206]
C000185166 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [206]
C000185166 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [206]
C000185166 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [206]
C000185166 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [206]
C000185166 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [206]
C000185166 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [206]
C000185166 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [206]
C000185166 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [206]
C000185166 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [206]
C000185166 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [206]
C000175603 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [207]
C000175603 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [207]
C000175603 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [207]
C000175603 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [207]
C000175603 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [207]
C000175603 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [207]
C000175603 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [207]
C000175603 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [207]
C000175603 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [207]
C000175603 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [207]
C000175603 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [207]
C000175603 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [207]
C000175602 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [208]
C000175602 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [208]
C000175602 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20% [208]
C000175602 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.70% [208]
C000175602 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [208]
C000175602 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [208]
C000175602 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.50% [208]
C000175602 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.30% [208]
C000175602 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 22.00% [208]
C000175602 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.60% [208]
C000175602 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [208]
C000175602 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [208]
C000236422 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236422 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236422 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236422 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236422 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236424 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236424 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236424 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236424 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236424 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236423 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236423 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236423 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236423 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236423 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236425 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236425 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236425 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236425 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236425 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236421 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236421 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236421 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236421 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236421 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236420 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236420 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236420 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236420 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236420 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
C000236419 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236419 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.70%
C000236419 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (5.40%)
C000236419 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 51.50%
C000236419 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 50.20%
[1] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[2] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[3] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[4] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[5] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[6] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[7] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[8]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[9] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[10]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[11] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[12]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[13] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[14]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[15] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[16]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[17] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[18]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[19]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[20]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[21]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[22]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[23]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[24]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[25] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[26] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[27]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[28]
Percentage rounds to zero.
[29]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[30]
Percentage rounds to zero.
[31] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[32] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[33]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[34]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[35]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[36]
Percentage rounds to zero.
[37]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[38]
Percentage rounds to zero.
[39]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[40] Percentage rounds to zero.
[41] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[42]
Percentage rounds to zero.
[43]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[44]
Percentage rounds to zero.
[45]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[46]
Percentage rounds to zero.
[47]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[48]
Percentage rounds to zero.
[49]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[50]
Percentage rounds to zero.
[51]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[52]
Percentage rounds to zero.
[53]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[54]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[55]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[56]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[57]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[58]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[59]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[60]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[61]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[62]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[63]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[64]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[65] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[66] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[67] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[68] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[69]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[70]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[71]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[72]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[73] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[74] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[75]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[76]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[77]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[78]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[79]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[80]
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[81] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[82] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[83] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[84] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[85] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[86] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[87] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[88] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[89] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[90] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[91] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[92] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[93] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[94] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[95] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[96] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[97]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[98]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[99] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[100]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[101]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[102] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[103] Percentage rounds to zero.
[104]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[105]
Percentage rounds to zero.
[106]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[107]
Percentage rounds to zero.
[108]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[109]
Percentage rounds to zero.
[110] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[111] Percentage rounds to zero.
[112] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[113] Percentage rounds to zero.
[114]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[115]
Percentage rounds to zero.
[116]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[117]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[118]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[119]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[120]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[121] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[122] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[123] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[124]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[125]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[126]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[127]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[128]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[129]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[130] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[131] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[132] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[133]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[134]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[135]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[136] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[137] Percentage rounds to zero.
[138] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[139] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[140]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[141]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[142] Percentage rounds to zero.
[143] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[144]
Percentage rounds to zero.
[145]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[146]
Percentage rounds to zero.
[147]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[148]
Percentage rounds to zero.
[149]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[150]
Percentage rounds to zero.
[151]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[152]
Percentage rounds to zero.
[153]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[154]
Percentage rounds to zero.
[155]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[156]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[157]
Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[158] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[159] Ten largest state allocations are presented. Additional state allocations are found in Other Municipal Bonds.
[160] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[161] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[162] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[163] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[164] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[165] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[166] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[167] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[168]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[169]
Percentage rounds to zero.
[170]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[171]
Percentage rounds to zero.
[172]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[173]
Percentage rounds to zero.
[174]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[175]
Percentage rounds to zero.
[176] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[177] Percentage rounds to zero.
[178]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[179]
Percentage rounds to zero.
[180] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[181] Percentage rounds to zero.
[182]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[183]
Percentage rounds to zero.
[184]
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[185]
Percentage rounds to zero.
[186] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[187] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[188] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[189] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[190] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[191] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[192] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[193] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[194] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[195] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[196] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[197] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[198] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[199] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[200] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[201] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[202] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[203] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[204] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[205] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[206]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[207]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[208]
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.