v3.26.1
Shareholder Report, Holdings (Details)
Mar. 31, 2026
C000066034 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [1]
C000066034 [Member] | Life Sciences Tools And Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [1]
C000066034 [Member] | Electronic Equipment Instruments And Components [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [1]
C000066034 [Member] | Multi Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [1]
C000066034 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000066034 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [1]
C000066034 [Member] | Building Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [1]
C000066034 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [1]
C000066034 [Member] | Machinery [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [1]
C000066034 [Member] | Water Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [1]
C000066034 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [1]
C000061367 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [2]
C000061367 [Member] | Life Sciences Tools And Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [2]
C000061367 [Member] | Electronic Equipment Instruments And Components [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [2]
C000061367 [Member] | Multi Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [2]
C000061367 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [2]
C000061367 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [2]
C000061367 [Member] | Building Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [2]
C000061367 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [2]
C000061367 [Member] | Machinery [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [2]
C000061367 [Member] | Water Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [2]
C000061367 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [2]
C000061366 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [3]
C000061366 [Member] | Life Sciences Tools And Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [3]
C000061366 [Member] | Electronic Equipment Instruments And Components [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [3]
C000061366 [Member] | Multi Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [3]
C000061366 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [3]
C000061366 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [3]
C000061366 [Member] | Building Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [3]
C000061366 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [3]
C000061366 [Member] | Machinery [Member]  
Holdings [Line Items]  
Percent of Total Investments 23.00% [3]
C000061366 [Member] | Water Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 36.00% [3]
C000061366 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [3]
C000075799 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [4]
C000075799 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [4]
C000075799 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [4]
C000075799 [Member] | Affiliated Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [4]
C000075799 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [4]
C000075799 [Member] | Insurance [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [4]
C000075799 [Member] | Marine Transportation [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075799 [Member] | All other Common Stocks [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [4]
C000075799 [Member] | Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [4]
C000075799 [Member] | Financial Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [4]
C000075799 [Member] | Banks Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075799 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [4]
C000075799 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075799 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075799 [Member] | Financial Services Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075799 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [4]
C000075797 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [5]
C000075797 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [5]
C000075797 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [5]
C000075797 [Member] | Affiliated Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [5]
C000075797 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [5]
C000075797 [Member] | Insurance [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [5]
C000075797 [Member] | Marine Transportation [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000075797 [Member] | All other Common Stocks [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [5]
C000075797 [Member] | Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [5]
C000075797 [Member] | Financial Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [5]
C000075797 [Member] | Banks Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000075797 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [5]
C000075797 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000075797 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000075797 [Member] | Financial Services Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000075797 [Member] | Convertible Preferred Stocks [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [5]
C000160541 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [6]
C000160541 [Member] | Common Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [6]
C000160541 [Member] | Affiliated Mutual Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 50.00% [6]
C000160541 [Member] | Affiliated Exchange Traded Funds [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [6]
C000160541 [Member] | Banks [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [6]
C000160541 [Member] | Insurance [Member]  
Holdings [Line Items]  
Percent of Total Investments 2.00% [6]
C000160541 [Member] | Marine Transportation [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000160541 [Member] | All other Common Stocks [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [6]
C000160541 [Member] | Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [6]
C000160541 [Member] | Financial Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [6]
C000160541 [Member] | Banks Equity Linked Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000160541 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [6]
C000160541 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000160541 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000160541 [Member] | Financial Services Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000160541 [Member] | Convertible Preferred Stocks [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [6]
C000235255 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [7]
C000235255 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 84.00% [7]
C000235255 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [7]
C000235255 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [7]
C000235255 [Member] | All other Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 55.00% [7]
C000235255 [Member] | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [7]
C000235255 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [7]
C000235255 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [7]
C000086661 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [8]
C000086661 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 84.00% [8]
C000086661 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [8]
C000086661 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [8]
C000086661 [Member] | All other Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 55.00% [8]
C000086661 [Member] | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [8]
C000086661 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [8]
C000086661 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [8]
C000086659 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [9]
C000086659 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 84.00% [9]
C000086659 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [9]
C000086659 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [9]
C000086659 [Member] | All other Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 55.00% [9]
C000086659 [Member] | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [9]
C000086659 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [9]
C000086659 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [9]
C000086658 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [10]
C000086658 [Member] | Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 84.00% [10]
C000086658 [Member] | Computers [Member]  
Holdings [Line Items]  
Percent of Total Investments 12.00% [10]
C000086658 [Member] | Software [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [10]
C000086658 [Member] | All other Convertible Bonds and Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 55.00% [10]
C000086658 [Member] | Electric Utilities [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [10]
C000086658 [Member] | Convertible Preferred Stock [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [10]
C000086658 [Member] | Short-Term Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [10]
C000086672 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [11]
C000086672 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [11]
C000086672 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [11]
C000086672 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [11]
C000086672 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [11]
C000086672 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [11]
C000086672 [Member] | Metals And Mining [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [11]
C000086672 [Member] | Oil Gas And Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [11]
C000086672 [Member] | Banks Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [11]
C000086672 [Member] | Semiconductors And Semiconductor Equipment [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [11]
C000086672 [Member] | Food Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [11]
C000086672 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [11]
C000086675 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [12]
C000086675 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [12]
C000086675 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [12]
C000086675 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [12]
C000086675 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [12]
C000086675 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [12]
C000086675 [Member] | Metals And Mining [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [12]
C000086675 [Member] | Oil Gas And Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [12]
C000086675 [Member] | Banks Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [12]
C000086675 [Member] | Semiconductors And Semiconductor Equipment [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [12]
C000086675 [Member] | Food Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [12]
C000086675 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [12]
C000165874 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [13]
C000165874 [Member] | Construction And Engineering [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [13]
C000165874 [Member] | Trading Companies And Distributors [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [13]
C000165874 [Member] | Commercial Services And Supplies [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [13]
C000165874 [Member] | Chemicals Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [13]
C000165874 [Member] | Insurance Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 4.00% [13]
C000165874 [Member] | Metals And Mining [Member]  
Holdings [Line Items]  
Percent of Total Investments 10.00% [13]
C000165874 [Member] | Oil Gas And Consumable Fuels [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [13]
C000165874 [Member] | Banks Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 8.00% [13]
C000165874 [Member] | Semiconductors And Semiconductor Equipment [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [13]
C000165874 [Member] | Food Products [Member]  
Holdings [Line Items]  
Percent of Total Investments 3.00% [13]
C000165874 [Member] | Other includes short term investment [Member]  
Holdings [Line Items]  
Percent of Total Investments 40.00% [13]
C000177646 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [14]
C000177646 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [14]
C000177646 [Member] | All Other Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 42.00% [14]
C000177646 [Member] | Communication Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [14]
C000177646 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [14]
C000177646 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [14]
C000177646 [Member] | Corporate Bonds And Note [Member]  
Holdings [Line Items]  
Percent of Total Investments 90.00% [14]
C000177646 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [14]
C000103878 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [15]
C000103878 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [15]
C000103878 [Member] | All Other Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 42.00% [15]
C000103878 [Member] | Communication Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [15]
C000103878 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [15]
C000103878 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [15]
C000103878 [Member] | Corporate Bonds And Note [Member]  
Holdings [Line Items]  
Percent of Total Investments 90.00% [15]
C000103878 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [15]
C000103877 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [16]
C000103877 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [16]
C000103877 [Member] | All Other Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 42.00% [16]
C000103877 [Member] | Communication Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [16]
C000103877 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [16]
C000103877 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [16]
C000103877 [Member] | Corporate Bonds And Note [Member]  
Holdings [Line Items]  
Percent of Total Investments 90.00% [16]
C000103877 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [16]
C000103876 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [17]
C000103876 [Member] | Leveraged Loans [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [17]
C000103876 [Member] | All Other Corporate Bonds And Notes [Member]  
Holdings [Line Items]  
Percent of Total Investments 42.00% [17]
C000103876 [Member] | Communication Services [Member]  
Holdings [Line Items]  
Percent of Total Investments 9.00% [17]
C000103876 [Member] | Energy [Member]  
Holdings [Line Items]  
Percent of Total Investments 14.00% [17]
C000103876 [Member] | Financials [Member]  
Holdings [Line Items]  
Percent of Total Investments 25.00% [17]
C000103876 [Member] | Corporate Bonds And Note [Member]  
Holdings [Line Items]  
Percent of Total Investments 90.00% [17]
C000103876 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Investments 1.00% [17]
C000118783 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [18]
C000118783 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [18]
C000118783 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [18]
C000118783 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [18]
C000118783 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [18]
C000118783 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [18]
C000118783 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.00% [18]
C000118783 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [18]
C000118783 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [18]
C000118780 [Member]  
Holdings [Line Items]  
Percent of Total Investments 100.00% [19]
C000118780 [Member] | Financial Services Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 11.00% [19]
C000118780 [Member] | Healthcare Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 7.00% [19]
C000118780 [Member] | Communications Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 5.00% [19]
C000118780 [Member] | Consumer Discretionary Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 17.00% [19]
C000118780 [Member] | Industrial Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [19]
C000118780 [Member] | Information Technology Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 35.00% [19]
C000118780 [Member] | Materials Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 13.00% [19]
C000118780 [Member] | Unclassified Sector [Member]  
Holdings [Line Items]  
Percent of Total Investments 6.00% [19]
[1] Percentage of total investments as of March 31, 2026.
[2]
Percentage of total investments as of March 31, 2026.
[3]
Percentage of total investments as of March 31, 2026.
[4] Percentage of total investments as of March 31, 2026.
[5] Percentage of total investments as of March 31, 2026.
[6] Percentage of total investments as of March 31, 2026.
[7] Percentage of total investments as of March 31, 2026.
[8] Percentage of total investments as of March 31, 2026.
[9]
Percentage of total investments as of March 31, 2026.
[10]
Percentage of total investments as of March 31, 2026.
[11] Percentage of total investments as of March 31, 2026.
[12]
Percentage of total investments as of March 31, 2026.
[13]
Percentage of total investments as of March 31, 2026.
[14]
Percentage of total investments as of March 31, 2026.
[15] Percentage of total investments as of March 31, 2026.
[16] Percentage of total investments as of March 31, 2026.
[17] Percentage of total investments as of March 31, 2026.
[18]
Percentage of total investments as of March 31, 2026.
[19]
Percentage of total investments as of March 31, 2026.