v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
C000176707 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [1]
C000176707 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [1]
C000176707 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [1]
C000176707 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000176707 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [1]
C000176707 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [1]
C000176707 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000176707 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [1]
C000176707 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [1]
C000176707 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [1]
C000176707 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.00% [1]
C000176707 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [1]
C000176707 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000003575 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [2]
C000003575 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [2]
C000003575 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [2]
C000003575 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [2]
C000003575 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [2]
C000003575 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [2]
C000003575 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [2]
C000003575 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [2]
C000003575 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [2]
C000003575 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [2]
C000003575 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.00% [2]
C000003575 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [2]
C000003575 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [2]
C000003574 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [3]
C000003574 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [3]
C000003574 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [3]
C000003574 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [3]
C000003574 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [3]
C000003574 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [3]
C000003574 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [3]
C000003574 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [3]
C000003574 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [3]
C000003574 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [3]
C000003574 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.00% [3]
C000003574 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [3]
C000003574 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [3]
C000003572 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [4]
C000003572 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [4]
C000003572 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [4]
C000003572 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [4]
C000003572 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [4]
C000003572 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [4]
C000003572 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [4]
C000003572 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [4]
C000003572 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [4]
C000003572 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000003572 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 29.00% [4]
C000003572 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [4]
C000003572 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [4]
C000049901 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [5]
C000049901 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [5]
C000049901 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [5]
C000049901 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [5]
C000049901 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [5]
C000049901 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [5]
C000049901 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [5]
C000049901 [Member] | Specialty REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [5]
C000049901 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [5]
C000049903 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [6]
C000049903 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [6]
C000049903 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [6]
C000049903 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [6]
C000049903 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [6]
C000049903 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [6]
C000049903 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [6]
C000049903 [Member] | Specialty REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [6]
C000049903 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [6]
C000049904 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [7]
C000049904 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [7]
C000049904 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [7]
C000049904 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [7]
C000049904 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [7]
C000049904 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [7]
C000049904 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [7]
C000049904 [Member] | Specialty REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [7]
C000049904 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [7]
C000148854 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [8]
C000148854 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 21.00% [8]
C000148854 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [8]
C000148854 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [8]
C000148854 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [8]
C000148854 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [8]
C000148854 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [8]
C000148854 [Member] | Specialty REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [8]
C000148854 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [8]
C000176708 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [9]
C000176708 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [9]
C000176708 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.00% [9]
C000176708 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [9]
C000176708 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [9]
C000176708 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [9]
C000176708 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.00% [9]
C000176708 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [9]
C000176708 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [9]
C000119169 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [10]
C000119169 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [10]
C000119169 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.00% [10]
C000119169 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [10]
C000119169 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [10]
C000119169 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [10]
C000119169 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.00% [10]
C000119169 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [10]
C000119169 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [10]
C000049913 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [11]
C000049913 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 0.00% [11]
C000049913 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 43.00% [11]
C000049913 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [11]
C000049913 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [11]
C000049913 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [11]
C000049913 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 95.00% [11]
C000049913 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [11]
C000049913 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [11]
C000049915 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [12]
C000049915 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [12]
C000049915 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [12]
C000049915 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [12]
C000049915 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [12]
C000049915 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [12]
C000049915 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [12]
C000049915 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [12]
C000049915 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [12]
C000049915 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [12]
C000049915 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [12]
C000049915 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [12]
C000049915 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [12]
C000049917 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [13]
C000049917 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [13]
C000049917 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [13]
C000049917 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [13]
C000049917 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [13]
C000049917 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [13]
C000049917 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [13]
C000049917 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [13]
C000049917 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [13]
C000049917 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [13]
C000049917 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [13]
C000049917 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [13]
C000049917 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [13]
C000081781 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [14]
C000081781 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [14]
C000081781 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [14]
C000081781 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [14]
C000081781 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [14]
C000081781 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [14]
C000081781 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [14]
C000081781 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [14]
C000081781 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [14]
C000081781 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [14]
C000081781 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [14]
C000081781 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [14]
C000081781 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [14]
C000148855 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [15]
C000148855 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [15]
C000148855 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [15]
C000148855 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [15]
C000148855 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [15]
C000148855 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [15]
C000148855 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [15]
C000148855 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [15]
C000148855 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 34.00% [15]
C000148855 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [15]
C000148855 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [15]
C000148855 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [15]
C000148855 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [15]
C000176709 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [16]
C000176709 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [16]
C000176709 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [16]
C000176709 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [16]
C000176709 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [16]
C000176709 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [16]
C000176709 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [16]
C000176709 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [16]
C000176709 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [16]
C000176709 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [16]
C000176709 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [16]
C000176709 [Member] | Other includes short term investment and securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [16]
C000066828 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [17]
C000066828 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [17]
C000066828 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [17]
C000066828 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [17]
C000066828 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [17]
C000066828 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [17]
C000066828 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [17]
C000066828 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [17]
C000066828 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [17]
C000066828 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [17]
C000066828 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [17]
C000066828 [Member] | Other includes short term investment and securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [17]
C000049921 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [18]
C000049921 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [18]
C000049921 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [18]
C000049921 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [18]
C000049921 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [18]
C000049921 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [18]
C000049921 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [18]
C000049921 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [18]
C000049921 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [18]
C000049921 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [18]
C000049921 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [18]
C000049921 [Member] | Other includes short term investment and securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [18]
C000049920 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [19]
C000049920 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [19]
C000049920 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [19]
C000049920 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [19]
C000049920 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [19]
C000049920 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [19]
C000049920 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [19]
C000049920 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [19]
C000049920 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [19]
C000049920 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [19]
C000049920 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [19]
C000049920 [Member] | Other includes short term investment and securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [19]
C000049918 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [20]
C000049918 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [20]
C000049918 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [20]
C000049918 [Member] | Foreign Government Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [20]
C000049918 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [20]
C000049918 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [20]
C000049918 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [20]
C000049918 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [20]
C000049918 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [20]
C000049918 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [20]
C000049918 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 27.00% [20]
C000049918 [Member] | Other includes short term investment and securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [20]
C000049922 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [21]
C000049922 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [21]
C000049922 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [21]
C000049922 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [21]
C000049922 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [21]
C000049922 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [21]
C000066829 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [22]
C000066829 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [22]
C000066829 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [22]
C000066829 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [22]
C000066829 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [22]
C000066829 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [22]
C000199804 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [23]
C000199804 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [23]
C000199804 [Member] | Real Estate Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [23]
C000199804 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [23]
C000199804 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [23]
C000199804 [Member] | Utilities Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [23]
C000235246 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [24]
C000235246 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.00% [24]
C000235246 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [24]
C000235246 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 77.00% [24]
C000081785 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [25]
C000081785 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.00% [25]
C000081785 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [25]
C000081785 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 77.00% [25]
C000052537 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [26]
C000052537 [Member] | Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 19.00% [26]
C000052537 [Member] | Affiliated Exchange Traded Fund [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [26]
C000052537 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 77.00% [26]
C000058006 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [27]
C000058006 [Member] | Service [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [27]
C000058006 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [27]
C000058006 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00% [27]
C000058006 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [27]
C000058006 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [27]
C000058006 [Member] | Information Technology [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [27]
C000058006 [Member] | Gaming Leisure [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [27]
C000058006 [Member] | Manufacturing [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [27]
C000058006 [Member] | Food Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [27]
C000058006 [Member] | All other Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 38.00% [27]
C000058007 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [28]
C000058007 [Member] | Service [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [28]
C000058007 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [28]
C000058007 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00% [28]
C000058007 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [28]
C000058007 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [28]
C000058007 [Member] | Information Technology [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [28]
C000058007 [Member] | Gaming Leisure [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [28]
C000058007 [Member] | Manufacturing [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [28]
C000058007 [Member] | Food Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [28]
C000058007 [Member] | All other Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 38.00% [28]
C000058008 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [29]
C000058008 [Member] | Service [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [29]
C000058008 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [29]
C000058008 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00% [29]
C000058008 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [29]
C000058008 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [29]
C000058008 [Member] | Information Technology [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [29]
C000058008 [Member] | Gaming Leisure [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [29]
C000058008 [Member] | Manufacturing [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [29]
C000058008 [Member] | Food Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [29]
C000058008 [Member] | All other Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 38.00% [29]
C000176710 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [30]
C000176710 [Member] | Service [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [30]
C000176710 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [30]
C000176710 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 96.00% [30]
C000176710 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [30]
C000176710 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [30]
C000176710 [Member] | Information Technology [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [30]
C000176710 [Member] | Gaming Leisure [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [30]
C000176710 [Member] | Manufacturing [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [30]
C000176710 [Member] | Food Tobacco [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [30]
C000176710 [Member] | All other Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 38.00% [30]
C000176711 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [31]
C000176711 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [31]
C000176711 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [31]
C000176711 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [31]
C000176711 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [31]
C000176711 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [31]
C000176711 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [31]
C000176711 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [31]
C000176711 [Member] | Real Estate Management And Development REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [31]
C000074734 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [32]
C000074734 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [32]
C000074734 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [32]
C000074734 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [32]
C000074734 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [32]
C000074734 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [32]
C000074734 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [32]
C000074734 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [32]
C000074734 [Member] | Real Estate Management And Development REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [32]
C000074733 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [33]
C000074733 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [33]
C000074733 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [33]
C000074733 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [33]
C000074733 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [33]
C000074733 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [33]
C000074733 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [33]
C000074733 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [33]
C000074733 [Member] | Real Estate Management And Development REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [33]
C000074732 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [34]
C000074732 [Member] | Health Care REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [34]
C000074732 [Member] | Industrial Office REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [34]
C000074732 [Member] | Retail REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [34]
C000074732 [Member] | Data Centers REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [34]
C000074732 [Member] | Residential REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [34]
C000074732 [Member] | Self Storage REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [34]
C000074732 [Member] | Other REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [34]
C000074732 [Member] | Real Estate Management And Development REITS [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [34]
C000117511 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [35]
C000117511 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [35]
C000117511 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [35]
C000117511 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [35]
C000117511 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [35]
C000117511 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [35]
C000117511 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [35]
C000117511 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [35]
C000117511 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [35]
C000117512 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [36]
C000117512 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [36]
C000117512 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [36]
C000117512 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [36]
C000117512 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [36]
C000117512 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [36]
C000117512 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [36]
C000117512 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [36]
C000117512 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [36]
C000117513 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [37]
C000117513 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [37]
C000117513 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [37]
C000117513 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [37]
C000117513 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [37]
C000117513 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [37]
C000117513 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [37]
C000117513 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [37]
C000117513 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [37]
C000148859 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [38]
C000148859 [Member] | Energy Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [38]
C000148859 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [38]
C000148859 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [38]
C000148859 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 22.00% [38]
C000148859 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [38]
C000148859 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [38]
C000148859 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [38]
C000148859 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [38]
C000215024 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [39]
C000215024 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [39]
C000215024 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [39]
C000215024 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [39]
C000215024 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [39]
C000215024 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [39]
C000215024 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [39]
C000215024 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [39]
C000215024 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [39]
C000133103 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [40]
C000133103 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [40]
C000133103 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [40]
C000133103 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [40]
C000133103 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [40]
C000133103 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [40]
C000133103 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [40]
C000133103 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [40]
C000133103 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [40]
C000133102 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [41]
C000133102 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [41]
C000133102 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [41]
C000133102 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [41]
C000133102 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [41]
C000133102 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [41]
C000133102 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [41]
C000133102 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [41]
C000133102 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [41]
C000133101 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [42]
C000133101 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [42]
C000133101 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [42]
C000133101 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 16.00% [42]
C000133101 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [42]
C000133101 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [42]
C000133101 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [42]
C000133101 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [42]
C000133101 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [42]
C000173499 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [43]
C000173499 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [43]
C000173499 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [43]
C000173499 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [43]
C000173499 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [43]
C000173499 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [43]
C000173499 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [43]
C000173499 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [43]
C000173500 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [44]
C000173500 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [44]
C000173500 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [44]
C000173500 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [44]
C000173500 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [44]
C000173500 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [44]
C000173500 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [44]
C000173500 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [44]
C000173501 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [45]
C000173501 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [45]
C000173501 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [45]
C000173501 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [45]
C000173501 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [45]
C000173501 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [45]
C000173501 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [45]
C000173501 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [45]
C000173502 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [46]
C000173502 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [46]
C000173502 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [46]
C000173502 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [46]
C000173502 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [46]
C000173502 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 18.00% [46]
C000173502 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [46]
C000173502 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [46]
C000210350 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [47]
C000210350 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [47]
C000210350 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [47]
C000210350 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [47]
C000210350 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [47]
C000210350 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [47]
C000210350 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [47]
C000210350 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [47]
C000210350 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [47]
C000210350 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.00% [47]
C000210350 [Member] | Other includes securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [47]
C000173505 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [48]
C000173505 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [48]
C000173505 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [48]
C000173505 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [48]
C000173505 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [48]
C000173505 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [48]
C000173505 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [48]
C000173505 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [48]
C000173505 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [48]
C000173505 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.00% [48]
C000173505 [Member] | Other includes securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [48]
C000173504 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [49]
C000173504 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [49]
C000173504 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [49]
C000173504 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [49]
C000173504 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [49]
C000173504 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [49]
C000173504 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [49]
C000173504 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [49]
C000173504 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [49]
C000173504 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.00% [49]
C000173504 [Member] | Other includes securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [49]
C000173503 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [50]
C000173503 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [50]
C000173503 [Member] | Health Care [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [50]
C000173503 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [50]
C000173503 [Member] | All other Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [50]
C000173503 [Member] | Industrials [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [50]
C000173503 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [50]
C000173503 [Member] | Corporate Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [50]
C000173503 [Member] | Collateralized Mortgage-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 28.00% [50]
C000173503 [Member] | Asset-Backed Securities [Member]  
Holdings [Line Items]  
Percent of Total Investments 32.00% [50]
C000173503 [Member] | Other includes securities lending collateral [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [50]
C000173507 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [51]
C000173507 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [51]
C000173506 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [52]
C000173506 [Member] | Municipal Bonds [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [52]
C000227966 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [53]
C000227966 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [53]
C000227966 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 39.00% [53]
C000227966 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [53]
C000227966 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [53]
C000227966 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [53]
C000227966 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [53]
C000227966 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [53]
C000227966 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [53]
C000227965 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [54]
C000227965 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [54]
C000227965 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 39.00% [54]
C000227965 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [54]
C000227965 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [54]
C000227965 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [54]
C000227965 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [54]
C000227965 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [54]
C000227965 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [54]
C000227967 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [55]
C000227967 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [55]
C000227967 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 39.00% [55]
C000227967 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 15.00% [55]
C000227967 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [55]
C000227967 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [55]
C000227967 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [55]
C000227967 [Member] | Consumer Staples Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [55]
C000227967 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [55]
[1]
Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
[24] Percentage of total investments as of March 31, 2026.
[25] Percentage of total investments as of March 31, 2026.
[26] Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
[29]
Percentage of total investments as of March 31, 2026.
[30]
Percentage of total investments as of March 31, 2026.
[31] Percentage of total investments as of March 31, 2026.
[32] Percentage of total investments as of March 31, 2026.
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[34]
Percentage of total investments as of March 31, 2026.
[35]
Percentage of total investments as of March 31, 2026.
[36]
Percentage of total investments as of March 31, 2026.
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Percentage of total investments as of March 31, 2026.
[38]
Percentage of total investments as of March 31, 2026.
[39]
Percentage of total investments as of March 31, 2026.
[40] Percentage of total investments as of March 31, 2026.
[41] Percentage of total investments as of March 31, 2026.
[42] Percentage of total investments as of March 31, 2026.
[43] Percentage of total investments as of March 31, 2026.
[44] Percentage of total investments as of March 31, 2026.
[45] Percentage of total investments as of March 31, 2026.
[46] Percentage of total investments as of March 31, 2026.
[47]
Percentage of total investments as of March 31, 2026.
[48]
Percentage of total investments as of March 31, 2026.
[49] Percentage of total investments as of March 31, 2026.
[50] Percentage of total investments as of March 31, 2026.
[51] Percentage of total investments as of March 31, 2026.
[52] Percentage of total investments as of March 31, 2026.
[53]
Percentage of total investments as of March 31, 2026.
[54]
Percentage of total investments as of March 31, 2026.
[55]
Percentage of total investments as of March 31, 2026.