v3.25.2
Shareholder Report, Holdings (Details)
Apr. 30, 2025
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 88.30%
C000009916 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000009916 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009916 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009916 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000009916 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
C000009916 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009916 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009916 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000009918 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000009918 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009918 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009918 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000009918 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [2]
C000009918 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009918 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009918 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000035169 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000035169 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000035169 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000035169 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000035169 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [3]
C000035169 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000035169 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000035169 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000040930 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000040930 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040930 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040930 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040930 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [4]
C000040930 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040930 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040930 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000040931 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000040931 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040931 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040931 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040931 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [5]
C000040931 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040931 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040931 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000040932 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000040932 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040932 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000040932 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000040932 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [6]
C000040932 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040932 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040932 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000009919 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000009919 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009919 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000009919 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000009919 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [7]
C000009919 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009919 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009919 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 88.30%
C000185695 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000185695 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000185695 [Member] | Rights [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185695 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185695 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [8]
C000185695 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000185695 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185695 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
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 2.10%
C000009947 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000009947 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000009947 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000009947 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009947 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000009949 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000009949 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000009949 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000009949 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009949 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000049003 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000049003 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000049003 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000049003 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000049003 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000040942 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000040942 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000040942 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000040942 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040942 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000040943 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000040943 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000040943 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000040943 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040943 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000040944 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000040944 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000040944 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000040944 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000040944 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000227371 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000227371 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000227371 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000227371 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000227371 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000009950 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000009950 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000009950 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000009950 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000009950 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.10%
C000185702 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 90.40%
C000185702 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.40%
C000185702 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.30%
C000185702 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000185702 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
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 2.40%
C000009961 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000009961 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000009961 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009961 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009961 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009961 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000009961 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000009961 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [9]
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 2.40%
C000009963 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000009963 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000009963 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009963 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009963 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009963 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000009963 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000009963 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [10]
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 2.40%
C000035174 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000035174 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000035174 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000035174 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000035174 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000035174 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000035174 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000035174 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [11]
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 2.40%
C000040951 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000040951 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000040951 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040951 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040951 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040951 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000040951 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000040951 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [12]
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 2.40%
C000040952 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000040952 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000040952 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040952 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040952 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040952 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000040952 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000040952 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [13]
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 2.40%
C000040953 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000040953 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000040953 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000040953 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000040953 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000040953 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000040953 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000040953 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [14]
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 2.40%
C000009964 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000009964 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000009964 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000009964 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000009964 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000009964 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000009964 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000009964 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [15]
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 2.40%
C000185705 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000185705 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90%
C000185705 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185705 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00%
C000185705 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
C000185705 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 79.20%
C000185705 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000185705 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [16]
C000009965 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [17]
C000009965 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [17],[18]
C000009965 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [17]
C000009965 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [17]
C000009965 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [17]
C000009965 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [17]
C000009965 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [17]
C000009965 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [17]
C000009965 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [17]
C000009965 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [17]
C000009965 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [17]
C000009965 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [17]
C000009965 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [17]
C000009965 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [17],[19]
C000009967 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [20]
C000009967 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [20],[21]
C000009967 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [20]
C000009967 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [20]
C000009967 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [20]
C000009967 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [20]
C000009967 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [20]
C000009967 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [20]
C000009967 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [20]
C000009967 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [20]
C000009967 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [20]
C000009967 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [20]
C000009967 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [20]
C000009967 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [20],[22]
C000035175 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [23]
C000035175 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [23],[24]
C000035175 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [23]
C000035175 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [23]
C000035175 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [23]
C000035175 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [23]
C000035175 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [23]
C000035175 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [23]
C000035175 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [23]
C000035175 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [23]
C000035175 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [23]
C000035175 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [23]
C000035175 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [23]
C000035175 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [23],[25]
C000040954 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [26]
C000040954 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [26],[27]
C000040954 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [26]
C000040954 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [26]
C000040954 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [26]
C000040954 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [26]
C000040954 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [26]
C000040954 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [26]
C000040954 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [26]
C000040954 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [26]
C000040954 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [26]
C000040954 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [26]
C000040954 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [26]
C000040954 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [26],[28]
C000040955 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [29]
C000040955 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [29],[30]
C000040955 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [29]
C000040955 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [29]
C000040955 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [29]
C000040955 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [29]
C000040955 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [29]
C000040955 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [29]
C000040955 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [29]
C000040955 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [29]
C000040955 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [29]
C000040955 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [29]
C000040955 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [29]
C000040955 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [29],[31]
C000040956 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [32]
C000040956 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [32],[33]
C000040956 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [32]
C000040956 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [32]
C000040956 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [32]
C000040956 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [32]
C000040956 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [32]
C000040956 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [32]
C000040956 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [32]
C000040956 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [32]
C000040956 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [32]
C000040956 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [32]
C000040956 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [32]
C000040956 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [32],[34]
C000200564 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [35]
C000200564 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [35],[36]
C000200564 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [35]
C000200564 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [35]
C000200564 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [35]
C000200564 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [35]
C000200564 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [35]
C000200564 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [35]
C000200564 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [35]
C000200564 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [35]
C000200564 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [35]
C000200564 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [35]
C000200564 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [35]
C000200564 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [35],[37]
C000009968 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [38]
C000009968 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [38],[39]
C000009968 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [38]
C000009968 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [38]
C000009968 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [38]
C000009968 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [38]
C000009968 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [38]
C000009968 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [38]
C000009968 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [38]
C000009968 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [38]
C000009968 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [38]
C000009968 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [38]
C000009968 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [38]
C000009968 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [38],[40]
C000185707 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [41]
C000185707 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.40% [41],[42]
C000185707 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 12.40% [41]
C000185707 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [41]
C000185707 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 9.70% [41]
C000185707 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [41]
C000185707 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 8.00% [41]
C000185707 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 6.80% [41]
C000185707 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [41]
C000185707 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 5.60% [41]
C000185707 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 5.20% [41]
C000185707 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 5.00% [41]
C000185707 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [41]
C000185707 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [41],[43]
C000009969 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [44]
C000009969 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [44],[45]
C000009969 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [44]
C000009969 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [44]
C000009969 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [44]
C000009969 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [44]
C000009969 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [44]
C000009969 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [44]
C000009969 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [44]
C000009969 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [44]
C000009969 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [44]
C000009969 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [44]
C000009969 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [44]
C000009969 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [44]
C000009971 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [46]
C000009971 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [46],[47]
C000009971 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [46]
C000009971 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [46]
C000009971 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [46]
C000009971 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [46]
C000009971 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [46]
C000009971 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [46]
C000009971 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [46]
C000009971 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [46]
C000009971 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [46]
C000009971 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [46]
C000009971 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [46]
C000009971 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [46]
C000064694 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [48]
C000064694 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [48],[49]
C000064694 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [48]
C000064694 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [48]
C000064694 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [48]
C000064694 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [48]
C000064694 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [48]
C000064694 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [48]
C000064694 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [48]
C000064694 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [48]
C000064694 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [48]
C000064694 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [48]
C000064694 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [48]
C000064694 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [48]
C000040957 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [50]
C000040957 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [50],[51]
C000040957 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [50]
C000040957 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [50]
C000040957 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [50]
C000040957 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [50]
C000040957 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [50]
C000040957 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [50]
C000040957 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [50]
C000040957 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [50]
C000040957 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [50]
C000040957 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [50]
C000040957 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [50]
C000040957 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [50]
C000040958 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [52]
C000040958 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [52],[53]
C000040958 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [52]
C000040958 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [52]
C000040958 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [52]
C000040958 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [52]
C000040958 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [52]
C000040958 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [52]
C000040958 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [52]
C000040958 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [52]
C000040958 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [52]
C000040958 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [52]
C000040958 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [52]
C000040958 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [52]
C000040959 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [54]
C000040959 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [54],[55]
C000040959 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [54]
C000040959 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [54]
C000040959 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [54]
C000040959 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [54]
C000040959 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [54]
C000040959 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [54]
C000040959 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [54]
C000040959 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [54]
C000040959 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [54]
C000040959 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [54]
C000040959 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [54]
C000040959 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [54]
C000148292 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [56]
C000148292 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [56],[57]
C000148292 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [56]
C000148292 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [56]
C000148292 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [56]
C000148292 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [56]
C000148292 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [56]
C000148292 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [56]
C000148292 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [56]
C000148292 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [56]
C000148292 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [56]
C000148292 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [56]
C000148292 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [56]
C000148292 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [56]
C000009972 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [58]
C000009972 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [58],[59]
C000009972 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [58]
C000009972 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [58]
C000009972 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [58]
C000009972 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [58]
C000009972 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [58]
C000009972 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [58]
C000009972 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [58]
C000009972 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [58]
C000009972 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [58]
C000009972 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [58]
C000009972 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [58]
C000009972 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [58]
C000185709 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [60]
C000185709 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.40% [60],[61]
C000185709 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 13.20% [60]
C000185709 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [60]
C000185709 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 11.70% [60]
C000185709 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [60]
C000185709 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 3.30% [60]
C000185709 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 8.90% [60]
C000185709 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [60]
C000185709 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 6.50% [60]
C000185709 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.70% [60]
C000185709 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [60]
C000185709 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [60]
C000185709 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [60]
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 11.80%
C000010008 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000010008 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000010008 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000010008 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010008 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000010008 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [62]
C000010008 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000010010 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000010010 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000010010 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000010010 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010010 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000010010 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [63]
C000010010 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000085295 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000085295 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000085295 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000085295 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000085295 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000085295 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [64]
C000085295 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000105490 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000105490 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000105490 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000105490 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105490 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000105490 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [65]
C000105490 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000105491 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000105491 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000105491 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000105491 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105491 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000105491 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [66]
C000105491 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000105492 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000105492 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000105492 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000105492 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000105492 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000105492 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [67]
C000105492 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000211747 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000211747 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000211747 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000211747 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000211747 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000211747 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [68]
C000211747 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000010011 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000010011 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000010011 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000010011 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010011 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000010011 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [69]
C000010011 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
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 11.80%
C000185721 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30%
C000185721 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000185721 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 23.90%
C000185721 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000185721 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.10%
C000185721 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [70]
C000185721 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000010042 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010042 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [71]
C000010042 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000010042 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [71]
C000010042 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000010042 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000010042 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000010042 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000010042 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000010042 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [72]
C000010042 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000010044 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010044 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [73]
C000010044 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000010044 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [73]
C000010044 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000010044 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000010044 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000010044 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000010044 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000010044 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [74]
C000010044 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000035179 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000035179 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [75]
C000035179 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000035179 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [75]
C000035179 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000035179 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000035179 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000035179 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000035179 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000035179 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [76]
C000035179 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040987 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040987 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [77]
C000040987 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000040987 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [77]
C000040987 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000040987 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000040987 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000040987 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000040987 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000040987 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [78]
C000040987 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040988 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040988 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [79]
C000040988 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000040988 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [79]
C000040988 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000040988 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000040988 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000040988 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000040988 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000040988 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [80]
C000040988 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000040989 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000040989 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [81]
C000040989 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000040989 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [81]
C000040989 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000040989 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000040989 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000040989 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000040989 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000040989 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [82]
C000040989 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000148296 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000148296 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [83]
C000148296 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000148296 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [83]
C000148296 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000148296 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000148296 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000148296 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000148296 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000148296 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [84]
C000148296 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000010045 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000010045 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [85]
C000010045 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000010045 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [85]
C000010045 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000010045 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000010045 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000010045 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000010045 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000010045 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [86]
C000010045 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185727 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185727 [Member] | Senior Floating Rate Interests [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [87]
C000185727 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.00%
C000185727 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [87]
C000185727 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (8.30%)
C000185727 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000185727 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000185727 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.90%
C000185727 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20%
C000185727 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 36.40% [88]
C000185727 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000048995 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048995 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000048995 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048995 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000048995 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000048995 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000048995 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048995 [Member] | Development [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000048995 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048995 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000048995 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000048995 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000048995 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10% [89]
C000048995 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
C000048997 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048997 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000048997 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048997 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000048997 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000048997 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000048997 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048997 [Member] | Development [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000048997 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048997 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000048997 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000048997 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000048997 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10% [90]
C000048997 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
C000048998 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000048998 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000048998 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000048998 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000048998 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000048998 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000048998 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000048998 [Member] | Development [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000048998 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000048998 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000048998 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000048998 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000048998 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10% [91]
C000048998 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
C000200566 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000200566 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000200566 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000200566 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000200566 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000200566 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000200566 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000200566 [Member] | Development [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000200566 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000200566 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000200566 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000200566 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000200566 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10% [92]
C000200566 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
C000185741 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185741 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.80%
C000185741 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000185741 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000185741 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000185741 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.20%
C000185741 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.50%
C000185741 [Member] | Development [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.30%
C000185741 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185741 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.70%
C000185741 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60%
C000185741 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000185741 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.10% [93]
C000185741 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.90%
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 12.50%
C000049001 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000049001 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [94]
C000049001 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000049001 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [94]
C000049001 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000049001 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000049001 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000049001 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000049001 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [94]
C000049001 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000049001 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000049001 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [95]
C000049001 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000048999 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000048999 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [96]
C000048999 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000048999 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [96]
C000048999 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000048999 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000048999 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000048999 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000048999 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [96]
C000048999 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000048999 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000048999 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [97]
C000048999 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000049000 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000049000 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [98]
C000049000 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000049000 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [98]
C000049000 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000049000 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000049000 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000049000 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000049000 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [98]
C000049000 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000049000 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000049000 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [99]
C000049000 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000105493 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000105493 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [100]
C000105493 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000105493 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [100]
C000105493 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000105493 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000105493 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000105493 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000105493 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [100]
C000105493 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000105493 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000105493 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [101]
C000105493 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000105494 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000105494 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [102]
C000105494 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000105494 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [102]
C000105494 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000105494 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000105494 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000105494 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000105494 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [102]
C000105494 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000105494 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000105494 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [103]
C000105494 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000105495 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000105495 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [104]
C000105495 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000105495 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [104]
C000105495 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000105495 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000105495 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000105495 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000105495 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [104]
C000105495 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000105495 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000105495 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [105]
C000105495 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000148300 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000148300 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [106]
C000148300 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000148300 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [106]
C000148300 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000148300 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000148300 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000148300 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000148300 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [106]
C000148300 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000148300 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000148300 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [107]
C000148300 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000052097 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000052097 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [108]
C000052097 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000052097 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [108]
C000052097 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000052097 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000052097 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000052097 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000052097 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [108]
C000052097 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000052097 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000052097 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [109]
C000052097 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
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 12.50%
C000185743 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 34.50%
C000185743 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [110]
C000185743 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.00%
C000185743 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [110]
C000185743 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (7.90%)
C000185743 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185743 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 20.90%
C000185743 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.80%
C000185743 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [110]
C000185743 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 11.70%
C000185743 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.00%
C000185743 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 13.60% [111]
C000185743 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000065302 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [112]
C000065302 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [112],[113]
C000065302 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [112]
C000065302 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [112]
C000065302 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [112]
C000065302 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [112]
C000065302 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [112]
C000065302 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [112]
C000065302 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [112]
C000065302 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [112]
C000065302 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [112]
C000065302 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [112]
C000065302 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [112]
C000065302 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [112]
C000065304 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [114]
C000065304 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [114],[115]
C000065304 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [114]
C000065304 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [114]
C000065304 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [114]
C000065304 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [114]
C000065304 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [114]
C000065304 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [114]
C000065304 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [114]
C000065304 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [114]
C000065304 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [114]
C000065304 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [114]
C000065304 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [114]
C000065304 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [114]
C000065306 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [116]
C000065306 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [116],[117]
C000065306 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [116]
C000065306 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [116]
C000065306 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [116]
C000065306 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [116]
C000065306 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [116]
C000065306 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [116]
C000065306 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [116]
C000065306 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [116]
C000065306 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [116]
C000065306 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [116]
C000065306 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [116]
C000065306 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [116]
C000065307 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [118]
C000065307 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [118],[119]
C000065307 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [118]
C000065307 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [118]
C000065307 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [118]
C000065307 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [118]
C000065307 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [118]
C000065307 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [118]
C000065307 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [118]
C000065307 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [118]
C000065307 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [118]
C000065307 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [118]
C000065307 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [118]
C000065307 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [118]
C000065308 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [120]
C000065308 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [120],[121]
C000065308 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [120]
C000065308 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [120]
C000065308 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [120]
C000065308 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [120]
C000065308 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [120]
C000065308 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [120]
C000065308 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [120]
C000065308 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [120]
C000065308 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [120]
C000065308 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [120]
C000065308 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [120]
C000065308 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [120]
C000065309 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [122]
C000065309 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [122],[123]
C000065309 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [122]
C000065309 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [122]
C000065309 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [122]
C000065309 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [122]
C000065309 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [122]
C000065309 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [122]
C000065309 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [122]
C000065309 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [122]
C000065309 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [122]
C000065309 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [122]
C000065309 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [122]
C000065309 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [122]
C000200567 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [124]
C000200567 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [124],[125]
C000200567 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [124]
C000200567 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [124]
C000200567 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [124]
C000200567 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [124]
C000200567 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [124]
C000200567 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [124]
C000200567 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [124]
C000200567 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [124]
C000200567 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [124]
C000200567 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [124]
C000200567 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [124]
C000200567 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [124]
C000065305 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [126]
C000065305 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [126],[127]
C000065305 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [126]
C000065305 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [126]
C000065305 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [126]
C000065305 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [126]
C000065305 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [126]
C000065305 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [126]
C000065305 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [126]
C000065305 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [126]
C000065305 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [126]
C000065305 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [126]
C000065305 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [126]
C000065305 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [126]
C000185747 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [128]
C000185747 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [128],[129]
C000185747 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [128]
C000185747 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.90% [128]
C000185747 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 8.40% [128]
C000185747 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 8.30% [128]
C000185747 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 4.70% [128]
C000185747 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.50% [128]
C000185747 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 5.90% [128]
C000185747 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 7.00% [128]
C000185747 [Member] | CANADA  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [128]
C000185747 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 4.30% [128]
C000185747 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [128]
C000185747 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [128]
C000089180 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [130]
C000089180 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [130],[131]
C000089180 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [130]
C000089180 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [130]
C000089180 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [130]
C000089180 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [130]
C000089180 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [130]
C000089180 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [130]
C000089180 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [130]
C000089180 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [130]
C000089180 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [130]
C000089180 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [130]
C000089180 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [130]
C000089180 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [130]
C000089181 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [132]
C000089181 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [132],[133]
C000089181 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [132]
C000089181 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [132]
C000089181 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [132]
C000089181 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [132]
C000089181 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [132]
C000089181 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [132]
C000089181 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [132]
C000089181 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [132]
C000089181 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [132]
C000089181 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [132]
C000089181 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [132]
C000089181 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [132]
C000089182 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [134]
C000089182 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [134],[135]
C000089182 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [134]
C000089182 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [134]
C000089182 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [134]
C000089182 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [134]
C000089182 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [134]
C000089182 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [134]
C000089182 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [134]
C000089182 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [134]
C000089182 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [134]
C000089182 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [134]
C000089182 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [134]
C000089182 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [134]
C000089183 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [136]
C000089183 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [136],[137]
C000089183 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [136]
C000089183 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [136]
C000089183 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [136]
C000089183 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [136]
C000089183 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [136]
C000089183 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [136]
C000089183 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [136]
C000089183 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [136]
C000089183 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [136]
C000089183 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [136]
C000089183 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [136]
C000089183 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [136]
C000089184 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [138]
C000089184 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [138],[139]
C000089184 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [138]
C000089184 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [138]
C000089184 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [138]
C000089184 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [138]
C000089184 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [138]
C000089184 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [138]
C000089184 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [138]
C000089184 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [138]
C000089184 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [138]
C000089184 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [138]
C000089184 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [138]
C000089184 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [138]
C000089185 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [140]
C000089185 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [140],[141]
C000089185 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [140]
C000089185 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [140]
C000089185 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [140]
C000089185 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [140]
C000089185 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [140]
C000089185 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [140]
C000089185 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [140]
C000089185 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [140]
C000089185 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [140]
C000089185 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [140]
C000089185 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [140]
C000089185 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [140]
C000211748 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [142]
C000211748 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [142],[143]
C000211748 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [142]
C000211748 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [142]
C000211748 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [142]
C000211748 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [142]
C000211748 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [142]
C000211748 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [142]
C000211748 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [142]
C000211748 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [142]
C000211748 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [142]
C000211748 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [142]
C000211748 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [142]
C000211748 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [142]
C000089186 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [144]
C000089186 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [144],[145]
C000089186 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [144]
C000089186 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [144]
C000089186 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [144]
C000089186 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [144]
C000089186 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [144]
C000089186 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [144]
C000089186 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [144]
C000089186 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [144]
C000089186 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [144]
C000089186 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [144]
C000089186 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [144]
C000089186 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [144]
C000185753 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [146]
C000185753 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 18.60% [146],[147]
C000185753 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [146]
C000185753 [Member] | GERMANY  
Holdings [Line Items]  
Percent of Net Asset Value 6.30% [146]
C000185753 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 10.50% [146]
C000185753 [Member] | FRANCE  
Holdings [Line Items]  
Percent of Net Asset Value 12.10% [146]
C000185753 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 4.60% [146]
C000185753 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 6.70% [146]
C000185753 [Member] | ITALY  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [146]
C000185753 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [146]
C000185753 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.10% [146]
C000185753 [Member] | HONG KONG  
Holdings [Line Items]  
Percent of Net Asset Value 2.60% [146]
C000185753 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90% [146]
C000185753 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [146]
C000101254 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101254 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101254 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101254 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101254 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101254 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101254 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101254 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101255 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101255 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101255 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101255 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101255 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101255 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101255 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101255 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101256 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101256 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101256 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101256 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101256 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101256 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101256 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101256 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101257 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101257 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101257 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101257 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101257 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101257 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101257 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101257 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101258 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101258 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101258 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101258 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101258 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101258 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101258 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101258 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101259 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101259 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101259 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101259 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101259 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101259 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101259 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101259 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101260 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000101260 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000101260 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000101260 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000101260 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000101260 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000101260 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000101260 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185755 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185755 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 35.20%
C000185755 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185755 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.40%
C000185755 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.90%
C000185755 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.10%
C000185755 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 55.50%
C000185755 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000101266 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [148]
C000101266 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [148],[149]
C000101266 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [148]
C000101266 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [148]
C000101266 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [148]
C000101266 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [148]
C000101266 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [148]
C000101266 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [148]
C000101266 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [148]
C000101266 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [148]
C000101266 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [148]
C000101266 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [148]
C000101266 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [148]
C000101266 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [148]
C000101267 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [150]
C000101267 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [150],[151]
C000101267 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [150]
C000101267 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [150]
C000101267 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [150]
C000101267 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [150]
C000101267 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [150]
C000101267 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [150]
C000101267 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [150]
C000101267 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [150]
C000101267 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [150]
C000101267 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [150]
C000101267 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [150]
C000101267 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [150]
C000101261 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [152]
C000101261 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [152],[153]
C000101261 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [152]
C000101261 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [152]
C000101261 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [152]
C000101261 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [152]
C000101261 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [152]
C000101261 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [152]
C000101261 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [152]
C000101261 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [152]
C000101261 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [152]
C000101261 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [152]
C000101261 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [152]
C000101261 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [152]
C000101262 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [154]
C000101262 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [154],[155]
C000101262 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [154]
C000101262 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [154]
C000101262 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [154]
C000101262 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [154]
C000101262 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [154]
C000101262 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [154]
C000101262 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [154]
C000101262 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [154]
C000101262 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [154]
C000101262 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [154]
C000101262 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [154]
C000101262 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [154]
C000101263 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [156]
C000101263 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [156],[157]
C000101263 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [156]
C000101263 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [156]
C000101263 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [156]
C000101263 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [156]
C000101263 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [156]
C000101263 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [156]
C000101263 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [156]
C000101263 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [156]
C000101263 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [156]
C000101263 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [156]
C000101263 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [156]
C000101263 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [156]
C000101264 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [158]
C000101264 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [158],[159]
C000101264 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [158]
C000101264 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [158]
C000101264 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [158]
C000101264 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [158]
C000101264 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [158]
C000101264 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [158]
C000101264 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [158]
C000101264 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [158]
C000101264 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [158]
C000101264 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [158]
C000101264 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [158]
C000101264 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [158]
C000200569 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [160]
C000200569 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [160],[161]
C000200569 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [160]
C000200569 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [160]
C000200569 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [160]
C000200569 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [160]
C000200569 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [160]
C000200569 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [160]
C000200569 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [160]
C000200569 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [160]
C000200569 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [160]
C000200569 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [160]
C000200569 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [160]
C000200569 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [160]
C000101265 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [162]
C000101265 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [162],[163]
C000101265 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [162]
C000101265 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [162]
C000101265 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [162]
C000101265 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [162]
C000101265 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [162]
C000101265 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [162]
C000101265 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [162]
C000101265 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [162]
C000101265 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [162]
C000101265 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [162]
C000101265 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [162]
C000101265 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [162]
C000185757 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [164]
C000185757 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60% [164],[165]
C000185757 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 15.40% [164]
C000185757 [Member] | CHINA  
Holdings [Line Items]  
Percent of Net Asset Value 29.20% [164]
C000185757 [Member] | INDIA  
Holdings [Line Items]  
Percent of Net Asset Value 16.90% [164]
C000185757 [Member] | KOREA, REPUBLIC OF  
Holdings [Line Items]  
Percent of Net Asset Value 10.90% [164]
C000185757 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [164]
C000185757 [Member] | SAUDI ARABIA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [164]
C000185757 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 3.40% [164]
C000185757 [Member] | THAILAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [164]
C000185757 [Member] | UNITED ARAB EMIRATES  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [164]
C000185757 [Member] | MEXICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.50% [164]
C000185757 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [164]
C000185757 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50% [164]
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 4.30%
C000101268 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101268 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [166]
C000101268 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [166]
C000101268 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101268 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101268 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101268 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101268 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101268 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [167]
C000101268 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101269 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101269 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [168]
C000101269 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [168]
C000101269 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101269 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101269 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101269 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101269 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101269 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [169]
C000101269 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101270 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101270 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [170]
C000101270 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [170]
C000101270 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101270 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101270 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101270 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101270 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101270 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [171]
C000101270 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101271 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101271 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [172]
C000101271 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [172]
C000101271 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101271 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101271 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101271 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101271 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101271 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [173]
C000101271 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101272 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101272 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [174]
C000101272 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [174]
C000101272 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101272 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101272 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101272 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101272 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101272 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [175]
C000101272 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101273 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101273 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [176]
C000101273 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [176]
C000101273 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101273 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101273 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101273 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101273 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101273 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [177]
C000101273 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000148301 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000148301 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [178]
C000148301 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [178]
C000148301 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000148301 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000148301 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000148301 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000148301 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000148301 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [179]
C000148301 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000101274 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000101274 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [180]
C000101274 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [180]
C000101274 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000101274 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000101274 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000101274 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000101274 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000101274 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [181]
C000101274 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 4.30%
C000185759 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.10%
C000185759 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [182]
C000185759 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [182]
C000185759 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value (0.60%)
C000185759 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.80%
C000185759 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000185759 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.60%
C000185759 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 58.90%
C000185759 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [183]
C000185759 [Member] | Purchased Options [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.40%
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 12.30%
C000105103 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105103 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105103 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105103 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [184]
C000105103 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105103 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105103 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105103 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [185]
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 12.30%
C000105104 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105104 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105104 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105104 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [186]
C000105104 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105104 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105104 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105104 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [187]
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 12.30%
C000105105 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105105 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105105 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105105 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [188]
C000105105 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105105 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105105 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105105 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [189]
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 12.30%
C000105106 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105106 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105106 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105106 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [190]
C000105106 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105106 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105106 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105106 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [191]
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 12.30%
C000105107 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105107 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105107 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105107 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [192]
C000105107 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105107 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105107 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105107 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [193]
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 12.30%
C000105108 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105108 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105108 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105108 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [194]
C000105108 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105108 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105108 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105108 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [195]
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 12.30%
C000105109 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000105109 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105109 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000105109 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [196]
C000105109 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000105109 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000105109 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000105109 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [197]
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 12.30%
C000185761 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 31.30%
C000185761 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185761 [Member] | Convertible Bonds [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000185761 [Member] | Warrant [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [198]
C000185761 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000185761 [Member] | Asset And Commercial Mortgage Backed Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000185761 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20%
C000185761 [Member] | US Government Corporations and Agencies Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.40% [199]
C000156246 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156246 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000156246 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156246 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156246 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000156246 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000156246 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156246 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000156246 [Member] | Water [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156246 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000156246 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000156246 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156246 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40% [200]
C000156246 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
C000156247 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156247 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000156247 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156247 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156247 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000156247 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000156247 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156247 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000156247 [Member] | Water [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156247 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000156247 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000156247 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156247 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40% [201]
C000156247 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
C000156248 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156248 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000156248 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000156248 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156248 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000156248 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000156248 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000156248 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000156248 [Member] | Water [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000156248 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000156248 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000156248 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000156248 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40% [202]
C000156248 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
C000185771 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185771 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 12.50%
C000185771 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.90%
C000185771 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000185771 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 16.30%
C000185771 [Member] | Nursing Homes [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000185771 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.90%
C000185771 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.20%
C000185771 [Member] | Water [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00%
C000185771 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.10%
C000185771 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000185771 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.80%
C000185771 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.40% [203]
C000185771 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.70%
C000156249 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156249 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000156249 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000156249 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156249 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000156249 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156249 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000156249 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000156249 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000156249 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000156249 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000156249 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000156249 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [204]
C000156249 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
C000156250 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156250 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000156250 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000156250 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156250 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000156250 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156250 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000156250 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000156250 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000156250 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000156250 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000156250 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000156250 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [205]
C000156250 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
C000156251 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000156251 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000156251 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000156251 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000156251 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000156251 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000156251 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000156251 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000156251 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000156251 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000156251 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000156251 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000156251 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [206]
C000156251 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
C000185773 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000185773 [Member] | School District [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.90%
C000185773 [Member] | Airport [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.00%
C000185773 [Member] | Transportation Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 7.20%
C000185773 [Member] | Single Family Housing [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.30%
C000185773 [Member] | Medical [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.00%
C000185773 [Member] | Power [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 5.10%
C000185773 [Member] | Higher Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.30%
C000185773 [Member] | Education [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.10%
C000185773 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.10%
C000185773 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.80%
C000185773 [Member] | General Obligation [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.50%
C000185773 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.40% [207]
C000185773 [Member] | General Revenue [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 28.30%
C000166660 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [208]
C000166660 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [208]
C000166660 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [208]
C000166660 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [208]
C000166660 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [208]
C000166660 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [208]
C000166660 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [208]
C000166660 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [208]
C000166660 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [208]
C000166660 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [208]
C000166660 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [208]
C000166660 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [208]
C000166661 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [209]
C000166661 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [209]
C000166661 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [209]
C000166661 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [209]
C000166661 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [209]
C000166661 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [209]
C000166661 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [209]
C000166661 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [209]
C000166661 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [209]
C000166661 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [209]
C000166661 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [209]
C000166661 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [209]
C000166662 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [210]
C000166662 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [210]
C000166662 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [210]
C000166662 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [210]
C000166662 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [210]
C000166662 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [210]
C000166662 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [210]
C000166662 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [210]
C000166662 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [210]
C000166662 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [210]
C000166662 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [210]
C000166662 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [210]
C000166663 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [211]
C000166663 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [211]
C000166663 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [211]
C000166663 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [211]
C000166663 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [211]
C000166663 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [211]
C000166663 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [211]
C000166663 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [211]
C000166663 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [211]
C000166663 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [211]
C000166663 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [211]
C000166663 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [211]
C000166664 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [212]
C000166664 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [212]
C000166664 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [212]
C000166664 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [212]
C000166664 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [212]
C000166664 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [212]
C000166664 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [212]
C000166664 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [212]
C000166664 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [212]
C000166664 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [212]
C000166664 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [212]
C000166664 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [212]
C000166665 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [213]
C000166665 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [213]
C000166665 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [213]
C000166665 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [213]
C000166665 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [213]
C000166665 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [213]
C000166665 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [213]
C000166665 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [213]
C000166665 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [213]
C000166665 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [213]
C000166665 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [213]
C000166665 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [213]
C000166666 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [214]
C000166666 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [214]
C000166666 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [214]
C000166666 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [214]
C000166666 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [214]
C000166666 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [214]
C000166666 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [214]
C000166666 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [214]
C000166666 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [214]
C000166666 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [214]
C000166666 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [214]
C000166666 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [214]
C000166667 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [215]
C000166667 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [215]
C000166667 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [215]
C000166667 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [215]
C000166667 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [215]
C000166667 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [215]
C000166667 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [215]
C000166667 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [215]
C000166667 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [215]
C000166667 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [215]
C000166667 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [215]
C000166667 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [215]
C000185775 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [216]
C000185775 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 43.30% [216]
C000185775 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 14.80% [216]
C000185775 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.90% [216]
C000185775 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 9.20% [216]
C000185775 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 8.80% [216]
C000185775 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 6.20% [216]
C000185775 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [216]
C000185775 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [216]
C000185775 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [216]
C000185775 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [216]
C000185775 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.20% [216]
C000175596 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [217]
C000175596 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [217],[218]
C000175596 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [217]
C000175596 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [217]
C000175596 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [217]
C000175596 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [217]
C000175596 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [217]
C000175596 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [217]
C000175596 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [217]
C000175596 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [217]
C000175596 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [217]
C000175596 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [217]
C000175596 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [217]
C000175596 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [217]
C000175597 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [219]
C000175597 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [219],[220]
C000175597 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [219]
C000175597 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [219]
C000175597 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [219]
C000175597 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [219]
C000175597 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [219]
C000175597 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [219]
C000175597 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [219]
C000175597 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [219]
C000175597 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [219]
C000175597 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [219]
C000175597 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [219]
C000175597 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [219]
C000175598 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [221]
C000175598 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [221],[222]
C000175598 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [221]
C000175598 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [221]
C000175598 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [221]
C000175598 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [221]
C000175598 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [221]
C000175598 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [221]
C000175598 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [221]
C000175598 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [221]
C000175598 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [221]
C000175598 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [221]
C000175598 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [221]
C000175598 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [221]
C000175599 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [223]
C000175599 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [223],[224]
C000175599 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [223]
C000175599 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [223]
C000175599 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [223]
C000175599 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [223]
C000175599 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [223]
C000175599 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [223]
C000175599 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [223]
C000175599 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [223]
C000175599 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [223]
C000175599 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [223]
C000175599 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [223]
C000175599 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [223]
C000175600 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [225]
C000175600 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [225],[226]
C000175600 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [225]
C000175600 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [225]
C000175600 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [225]
C000175600 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [225]
C000175600 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [225]
C000175600 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [225]
C000175600 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [225]
C000175600 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [225]
C000175600 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [225]
C000175600 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [225]
C000175600 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [225]
C000175600 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [225]
C000175601 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [227]
C000175601 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [227],[228]
C000175601 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [227]
C000175601 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [227]
C000175601 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [227]
C000175601 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [227]
C000175601 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [227]
C000175601 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [227]
C000175601 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [227]
C000175601 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [227]
C000175601 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [227]
C000175601 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [227]
C000175601 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [227]
C000175601 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [227]
C000175602 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [229]
C000175602 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [229],[230]
C000175602 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [229]
C000175602 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [229]
C000175602 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [229]
C000175602 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [229]
C000175602 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [229]
C000175602 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [229]
C000175602 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [229]
C000175602 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [229]
C000175602 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [229]
C000175602 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [229]
C000175602 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [229]
C000175602 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [229]
C000175603 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [231]
C000175603 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [231],[232]
C000175603 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [231]
C000175603 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [231]
C000175603 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [231]
C000175603 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [231]
C000175603 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [231]
C000175603 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [231]
C000175603 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [231]
C000175603 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [231]
C000175603 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [231]
C000175603 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [231]
C000175603 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [231]
C000175603 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [231]
C000185166 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00% [233]
C000185166 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 4.00% [233],[234]
C000185166 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.10% [233]
C000185166 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 7.70% [233]
C000185166 [Member] | TAIWAN  
Holdings [Line Items]  
Percent of Net Asset Value 2.90% [233]
C000185166 [Member] | NETHERLANDS  
Holdings [Line Items]  
Percent of Net Asset Value 3.00% [233]
C000185166 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 69.10% [233]
C000185166 [Member] | SWITZERLAND  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [233]
C000185166 [Member] | BRAZIL  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [233]
C000185166 [Member] | SOUTH AFRICA  
Holdings [Line Items]  
Percent of Net Asset Value 2.40% [233]
C000185166 [Member] | PUERTO RICO  
Holdings [Line Items]  
Percent of Net Asset Value 1.30% [233]
C000185166 [Member] | IRELAND  
Holdings [Line Items]  
Percent of Net Asset Value 1.20% [233]
C000185166 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.90% [233]
C000185166 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [233]
C000236422 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236422 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236422 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236422 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236422 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236422 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236422 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236424 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236424 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236424 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236424 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236424 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236424 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236424 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236423 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236423 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236423 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236423 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236423 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236423 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236423 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236425 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236425 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236425 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236425 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236425 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236425 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236425 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236421 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236421 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236421 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236421 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236421 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236421 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236421 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236420 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236420 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236420 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236420 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236420 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236420 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236420 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
C000236419 [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 100.00%
C000236419 [Member] | Corporate Bond Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 39.30%
C000236419 [Member] | Other Assets And Liabilities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.10%
C000236419 [Member] | Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.50%
C000236419 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.30%
C000236419 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 59.10%
C000236419 [Member] | Foreign Government Obligations [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.70%
[1] Percentage rounds to zero.
[2] Percentage rounds to zero.
[3] Percentage rounds to zero.
[4] Percentage rounds to zero.
[5] Percentage rounds to zero.
[6] Percentage rounds to zero.
[7] Percentage rounds to zero.
[8] Percentage rounds to zero.
[9] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[10] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[11] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[12] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[13] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[14] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[15] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[16] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[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] Percentage rounds to zero.
[20] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[21] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[22] Percentage rounds to zero.
[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] Percentage rounds to zero.
[26] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[27] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[28] Percentage rounds to zero.
[29] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[30] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[31] Percentage rounds to zero.
[32] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[33] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[34] Percentage rounds to zero.
[35] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[36] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[37] Percentage rounds to zero.
[38] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[39] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[40] Percentage rounds to zero.
[41] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[42] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[43] Percentage rounds to zero.
[44] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[45] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[46] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[47] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[48] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[49] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[50] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[51] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[52] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[53] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[54] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[55] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[56] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[57] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[58] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[59] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[60] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[61] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[62] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[63] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[64] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[65] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[66] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[67] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[68] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[69] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[70] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[71] Percentage rounds to zero.
[72] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[73] Percentage rounds to zero.
[74] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[75] Percentage rounds to zero.
[76] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[77] Percentage rounds to zero.
[78] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[79] Percentage rounds to zero.
[80] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[81] Percentage rounds to zero.
[82] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[83] Percentage rounds to zero.
[84] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[85] Percentage rounds to zero.
[86] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[87] Percentage rounds to zero.
[88] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[89] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[90] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[91] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[92] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[93] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[94] Percentage rounds to zero.
[95] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[96] Percentage rounds to zero.
[97] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[98] Percentage rounds to zero.
[99] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[100] Percentage rounds to zero.
[101] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[102] Percentage rounds to zero.
[103] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[104] Percentage rounds to zero.
[105] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[106] Percentage rounds to zero.
[107] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[108] Percentage rounds to zero.
[109] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[110] Percentage rounds to zero.
[111] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[112] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[113] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[114] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[115] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[116] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[117] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[118] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[119] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[120] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[121] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[122] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[123] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[124] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[125] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[126] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[127] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[128] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[129] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[130] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[131] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[132] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[133] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[134] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[135] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[136] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[137] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[138] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[139] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[140] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[141] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[142] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[143] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[144] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[145] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[146] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[147] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[148] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[149] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[150] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[151] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[152] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[153] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[154] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[155] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[156] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[157] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[158] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[159] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[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] Percentage rounds to zero.
[167] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[168] Percentage rounds to zero.
[169] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[170] Percentage rounds to zero.
[171] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[172] Percentage rounds to zero.
[173] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[174] Percentage rounds to zero.
[175] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[176] Percentage rounds to zero.
[177] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[178] Percentage rounds to zero.
[179] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[180] Percentage rounds to zero.
[181] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[182] Percentage rounds to zero.
[183] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[184] Percentage rounds to zero.
[185] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[186] Percentage rounds to zero.
[187] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[188] Percentage rounds to zero.
[189] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[190] Percentage rounds to zero.
[191] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[192] Percentage rounds to zero.
[193] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[194] Percentage rounds to zero.
[195] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[196] Percentage rounds to zero.
[197] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[198] Percentage rounds to zero.
[199] All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
[200] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[201] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[202] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[203] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other along with U.S. Government Agencies.
[204] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other.
[205] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other.
[206] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other.
[207] Ten largest municipal bonds are presented. Additional municipal bonds are found in Other.
[208] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[209] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[210] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[211] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[212] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[213] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[214] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[215] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[216] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[217] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[218] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[219] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[220] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[221] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[222] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[223] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[224] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[225] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[226] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[227] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[228] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[229] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[230] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[231] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[232] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
[233] For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[234] Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.