v3.26.1
Shareholder Report, Holdings (Details)
Apr. 30, 2026
C000054209 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [1]
Percent of Total Long Exposure 25.30% [2]
Percent of Total Short Exposure (6.50%) [2]
Percent of Net Long Exposure 33.10% [3]
C000054209 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [1]
Percent of Total Long Exposure 0.70% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 1.60% [3]
C000054209 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [1]
Percent of Total Long Exposure 7.60% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 8.30% [3]
C000054209 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [1]
Percent of Total Long Exposure 3.60% [2]
Percent of Total Short Exposure (3.90%) [2]
Percent of Net Long Exposure 1.10% [3]
C000054209 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [1]
Percent of Total Long Exposure 4.20% [2]
Percent of Total Short Exposure (5.40%) [2]
Percent of Net Long Exposure 2.40% [3]
C000054209 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [1]
Percent of Total Long Exposure 0.50% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 3.30% [3]
C000054209 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure (0.20%) [2]
Percent of Net Long Exposure 3.40% [3]
C000054209 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [1]
Percent of Total Long Exposure 1.30% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 3.50% [3]
C000054209 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [1]
Percent of Total Long Exposure 1.90% [2]
Percent of Total Short Exposure (5.70%) [2]
Percent of Net Long Exposure 6.20% [3]
C000054209 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 0.00% [3]
C000054209 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure (17.80%) [2]
Percent of Net Long Exposure 4.10% [3]
C000054209 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure (6.10%) [2]
Percent of Net Short Exposure (5.50%) [3]
C000054209 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure (7.10%) [2]
Percent of Net Short Exposure (5.10%) [3]
C000054209 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [1]
Percent of Total Long Exposure 4.60% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 5.60% [3]
C000054209 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure 0.00% [2]
Percent of Net Long Exposure 0.60% [3]
C000054209 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [4]
C000054209 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [1]
Percent of Total Long Exposure 0.00% [2]
Percent of Total Short Exposure (25.80%) [2]
Percent of Net Long Exposure 4.40% [3]
C000054209 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [5]
C000054208 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [6]
Percent of Total Long Exposure 25.30% [7]
Percent of Total Short Exposure (6.50%) [7]
Percent of Net Long Exposure 33.10% [8]
C000054208 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [6]
Percent of Total Long Exposure 0.70% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 1.60% [8]
C000054208 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [6]
Percent of Total Long Exposure 7.60% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 8.30% [8]
C000054208 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [6]
Percent of Total Long Exposure 3.60% [7]
Percent of Total Short Exposure (3.90%) [7]
Percent of Net Long Exposure 1.10% [8]
C000054208 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [6]
Percent of Total Long Exposure 4.20% [7]
Percent of Total Short Exposure (5.40%) [7]
Percent of Net Long Exposure 2.40% [8]
C000054208 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [6]
Percent of Total Long Exposure 0.50% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 3.30% [8]
C000054208 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure (0.20%) [7]
Percent of Net Long Exposure 3.40% [8]
C000054208 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [6]
Percent of Total Long Exposure 1.30% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 3.50% [8]
C000054208 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [6]
Percent of Total Long Exposure 1.90% [7]
Percent of Total Short Exposure (5.70%) [7]
Percent of Net Long Exposure 6.20% [8]
C000054208 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 0.00% [8]
C000054208 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure (17.80%) [7]
Percent of Net Long Exposure 4.10% [8]
C000054208 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure (6.10%) [7]
Percent of Net Short Exposure (5.50%) [8]
C000054208 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure (7.10%) [7]
Percent of Net Short Exposure (5.10%) [8]
C000054208 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [6]
Percent of Total Long Exposure 4.60% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 5.60% [8]
C000054208 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure 0.00% [7]
Percent of Net Long Exposure 0.60% [8]
C000054208 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [9]
C000054208 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [6]
Percent of Total Long Exposure 0.00% [7]
Percent of Total Short Exposure (25.80%) [7]
Percent of Net Long Exposure 4.40% [8]
C000054208 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [10]
C000054217 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [11]
Percent of Total Long Exposure 25.30% [12]
Percent of Total Short Exposure (6.50%) [12]
Percent of Net Long Exposure 33.10% [13]
C000054217 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [11]
Percent of Total Long Exposure 0.70% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 1.60% [13]
C000054217 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [11]
Percent of Total Long Exposure 7.60% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 8.30% [13]
C000054217 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [11]
Percent of Total Long Exposure 3.60% [12]
Percent of Total Short Exposure (3.90%) [12]
Percent of Net Long Exposure 1.10% [13]
C000054217 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [11]
Percent of Total Long Exposure 4.20% [12]
Percent of Total Short Exposure (5.40%) [12]
Percent of Net Long Exposure 2.40% [13]
C000054217 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [11]
Percent of Total Long Exposure 0.50% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 3.30% [13]
C000054217 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure (0.20%) [12]
Percent of Net Long Exposure 3.40% [13]
C000054217 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [11]
Percent of Total Long Exposure 1.30% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 3.50% [13]
C000054217 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [11]
Percent of Total Long Exposure 1.90% [12]
Percent of Total Short Exposure (5.70%) [12]
Percent of Net Long Exposure 6.20% [13]
C000054217 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 0.00% [13]
C000054217 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure (17.80%) [12]
Percent of Net Long Exposure 4.10% [13]
C000054217 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure (6.10%) [12]
Percent of Net Short Exposure (5.50%) [13]
C000054217 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure (7.10%) [12]
Percent of Net Short Exposure (5.10%) [13]
C000054217 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [11]
Percent of Total Long Exposure 4.60% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 5.60% [13]
C000054217 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure 0.00% [12]
Percent of Net Long Exposure 0.60% [13]
C000054217 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [14]
C000054217 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [11]
Percent of Total Long Exposure 0.00% [12]
Percent of Total Short Exposure (25.80%) [12]
Percent of Net Long Exposure 4.40% [13]
C000054217 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [15]
C000054216 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [16]
Percent of Total Long Exposure 25.30% [17]
Percent of Total Short Exposure (6.50%) [17]
Percent of Net Long Exposure 33.10% [18]
C000054216 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [16]
Percent of Total Long Exposure 0.70% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 1.60% [18]
C000054216 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [16]
Percent of Total Long Exposure 7.60% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 8.30% [18]
C000054216 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [16]
Percent of Total Long Exposure 3.60% [17]
Percent of Total Short Exposure (3.90%) [17]
Percent of Net Long Exposure 1.10% [18]
C000054216 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [16]
Percent of Total Long Exposure 4.20% [17]
Percent of Total Short Exposure (5.40%) [17]
Percent of Net Long Exposure 2.40% [18]
C000054216 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [16]
Percent of Total Long Exposure 0.50% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 3.30% [18]
C000054216 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure (0.20%) [17]
Percent of Net Long Exposure 3.40% [18]
C000054216 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [16]
Percent of Total Long Exposure 1.30% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 3.50% [18]
C000054216 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [16]
Percent of Total Long Exposure 1.90% [17]
Percent of Total Short Exposure (5.70%) [17]
Percent of Net Long Exposure 6.20% [18]
C000054216 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 0.00% [18]
C000054216 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure (17.80%) [17]
Percent of Net Long Exposure 4.10% [18]
C000054216 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure (6.10%) [17]
Percent of Net Short Exposure (5.50%) [18]
C000054216 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure (7.10%) [17]
Percent of Net Short Exposure (5.10%) [18]
C000054216 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [16]
Percent of Total Long Exposure 4.60% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 5.60% [18]
C000054216 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure 0.00% [17]
Percent of Net Long Exposure 0.60% [18]
C000054216 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [19]
C000054216 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [16]
Percent of Total Long Exposure 0.00% [17]
Percent of Total Short Exposure (25.80%) [17]
Percent of Net Long Exposure 4.40% [18]
C000054216 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [20]
C000054214 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [21]
Percent of Total Long Exposure 25.30% [22]
Percent of Total Short Exposure (6.50%) [22]
Percent of Net Long Exposure 33.10% [23]
C000054214 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [21]
Percent of Total Long Exposure 0.70% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 1.60% [23]
C000054214 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [21]
Percent of Total Long Exposure 7.60% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 8.30% [23]
C000054214 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [21]
Percent of Total Long Exposure 3.60% [22]
Percent of Total Short Exposure (3.90%) [22]
Percent of Net Long Exposure 1.10% [23]
C000054214 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [21]
Percent of Total Long Exposure 4.20% [22]
Percent of Total Short Exposure (5.40%) [22]
Percent of Net Long Exposure 2.40% [23]
C000054214 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [21]
Percent of Total Long Exposure 0.50% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 3.30% [23]
C000054214 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure (0.20%) [22]
Percent of Net Long Exposure 3.40% [23]
C000054214 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [21]
Percent of Total Long Exposure 1.30% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 3.50% [23]
C000054214 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [21]
Percent of Total Long Exposure 1.90% [22]
Percent of Total Short Exposure (5.70%) [22]
Percent of Net Long Exposure 6.20% [23]
C000054214 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 0.00% [23]
C000054214 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure (17.80%) [22]
Percent of Net Long Exposure 4.10% [23]
C000054214 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure (6.10%) [22]
Percent of Net Short Exposure (5.50%) [23]
C000054214 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure (7.10%) [22]
Percent of Net Short Exposure (5.10%) [23]
C000054214 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [21]
Percent of Total Long Exposure 4.60% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 5.60% [23]
C000054214 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure 0.00% [22]
Percent of Net Long Exposure 0.60% [23]
C000054214 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [24]
C000054214 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [21]
Percent of Total Long Exposure 0.00% [22]
Percent of Total Short Exposure (25.80%) [22]
Percent of Net Long Exposure 4.40% [23]
C000054214 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [25]
C000054212 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [26]
Percent of Total Long Exposure 25.30% [27]
Percent of Total Short Exposure (6.50%) [27]
Percent of Net Long Exposure 33.10% [28]
C000054212 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [26]
Percent of Total Long Exposure 0.70% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 1.60% [28]
C000054212 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [26]
Percent of Total Long Exposure 7.60% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 8.30% [28]
C000054212 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [26]
Percent of Total Long Exposure 3.60% [27]
Percent of Total Short Exposure (3.90%) [27]
Percent of Net Long Exposure 1.10% [28]
C000054212 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [26]
Percent of Total Long Exposure 4.20% [27]
Percent of Total Short Exposure (5.40%) [27]
Percent of Net Long Exposure 2.40% [28]
C000054212 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [26]
Percent of Total Long Exposure 0.50% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 3.30% [28]
C000054212 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure (0.20%) [27]
Percent of Net Long Exposure 3.40% [28]
C000054212 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [26]
Percent of Total Long Exposure 1.30% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 3.50% [28]
C000054212 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [26]
Percent of Total Long Exposure 1.90% [27]
Percent of Total Short Exposure (5.70%) [27]
Percent of Net Long Exposure 6.20% [28]
C000054212 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 0.00% [28]
C000054212 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure (17.80%) [27]
Percent of Net Long Exposure 4.10% [28]
C000054212 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure (6.10%) [27]
Percent of Net Short Exposure (5.50%) [28]
C000054212 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure (7.10%) [27]
Percent of Net Short Exposure (5.10%) [28]
C000054212 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [26]
Percent of Total Long Exposure 4.60% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 5.60% [28]
C000054212 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure 0.00% [27]
Percent of Net Long Exposure 0.60% [28]
C000054212 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [29]
C000054212 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [26]
Percent of Total Long Exposure 0.00% [27]
Percent of Total Short Exposure (25.80%) [27]
Percent of Net Long Exposure 4.40% [28]
C000054212 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [30]
C000054211 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [31]
Percent of Total Long Exposure 25.30% [32]
Percent of Total Short Exposure (6.50%) [32]
Percent of Net Long Exposure 33.10% [33]
C000054211 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [31]
Percent of Total Long Exposure 0.70% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 1.60% [33]
C000054211 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [31]
Percent of Total Long Exposure 7.60% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 8.30% [33]
C000054211 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [31]
Percent of Total Long Exposure 3.60% [32]
Percent of Total Short Exposure (3.90%) [32]
Percent of Net Long Exposure 1.10% [33]
C000054211 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [31]
Percent of Total Long Exposure 4.20% [32]
Percent of Total Short Exposure (5.40%) [32]
Percent of Net Long Exposure 2.40% [33]
C000054211 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [31]
Percent of Total Long Exposure 0.50% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 3.30% [33]
C000054211 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure (0.20%) [32]
Percent of Net Long Exposure 3.40% [33]
C000054211 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [31]
Percent of Total Long Exposure 1.30% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 3.50% [33]
C000054211 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [31]
Percent of Total Long Exposure 1.90% [32]
Percent of Total Short Exposure (5.70%) [32]
Percent of Net Long Exposure 6.20% [33]
C000054211 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 0.00% [33]
C000054211 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure (17.80%) [32]
Percent of Net Long Exposure 4.10% [33]
C000054211 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure (6.10%) [32]
Percent of Net Short Exposure (5.50%) [33]
C000054211 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure (7.10%) [32]
Percent of Net Short Exposure (5.10%) [33]
C000054211 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [31]
Percent of Total Long Exposure 4.60% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 5.60% [33]
C000054211 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure 0.00% [32]
Percent of Net Long Exposure 0.60% [33]
C000054211 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [34]
C000054211 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [31]
Percent of Total Long Exposure 0.00% [32]
Percent of Total Short Exposure (25.80%) [32]
Percent of Net Long Exposure 4.40% [33]
C000054211 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [35]
C000054210 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [36]
Percent of Total Long Exposure 25.30% [37]
Percent of Total Short Exposure (6.50%) [37]
Percent of Net Long Exposure 33.10% [38]
C000054210 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [36]
Percent of Total Long Exposure 0.70% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 1.60% [38]
C000054210 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [36]
Percent of Total Long Exposure 7.60% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 8.30% [38]
C000054210 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [36]
Percent of Total Long Exposure 3.60% [37]
Percent of Total Short Exposure (3.90%) [37]
Percent of Net Long Exposure 1.10% [38]
C000054210 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [36]
Percent of Total Long Exposure 4.20% [37]
Percent of Total Short Exposure (5.40%) [37]
Percent of Net Long Exposure 2.40% [38]
C000054210 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [36]
Percent of Total Long Exposure 0.50% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 3.30% [38]
C000054210 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure (0.20%) [37]
Percent of Net Long Exposure 3.40% [38]
C000054210 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [36]
Percent of Total Long Exposure 1.30% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 3.50% [38]
C000054210 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [36]
Percent of Total Long Exposure 1.90% [37]
Percent of Total Short Exposure (5.70%) [37]
Percent of Net Long Exposure 6.20% [38]
C000054210 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 0.00% [38]
C000054210 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure (17.80%) [37]
Percent of Net Long Exposure 4.10% [38]
C000054210 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure (6.10%) [37]
Percent of Net Short Exposure (5.50%) [38]
C000054210 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure (7.10%) [37]
Percent of Net Short Exposure (5.10%) [38]
C000054210 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [36]
Percent of Total Long Exposure 4.60% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 5.60% [38]
C000054210 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure 0.00% [37]
Percent of Net Long Exposure 0.60% [38]
C000054210 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [39]
C000054210 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [36]
Percent of Total Long Exposure 0.00% [37]
Percent of Total Short Exposure (25.80%) [37]
Percent of Net Long Exposure 4.40% [38]
C000054210 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [40]
C000054207 [Member] | UNITED STATES  
Holdings [Line Items]  
Percent of Net Asset Value 14.30% [41]
Percent of Total Long Exposure 25.30% [42]
Percent of Total Short Exposure (6.50%) [42]
Percent of Net Long Exposure 33.10% [43]
C000054207 [Member] | UNITED KINGDOM  
Holdings [Line Items]  
Percent of Net Asset Value 0.90% [41]
Percent of Total Long Exposure 0.70% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 1.60% [43]
C000054207 [Member] | JAPAN  
Holdings [Line Items]  
Percent of Net Asset Value 0.70% [41]
Percent of Total Long Exposure 7.60% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 8.30% [43]
C000054207 [Member] | Asia Pacific ex Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.40% [41]
Percent of Total Long Exposure 3.60% [42]
Percent of Total Short Exposure (3.90%) [42]
Percent of Net Long Exposure 1.10% [43]
C000054207 [Member] | Emerging Markets Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [41]
Percent of Total Long Exposure 4.20% [42]
Percent of Total Short Exposure (5.40%) [42]
Percent of Net Long Exposure 2.40% [43]
C000054207 [Member] | United Kingdom Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.80% [41]
Percent of Total Long Exposure 0.50% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 3.30% [43]
C000054207 [Member] | Japan Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 3.60% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure (0.20%) [42]
Percent of Net Long Exposure 3.40% [43]
C000054207 [Member] | North America ex U S Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.20% [41]
Percent of Total Long Exposure 1.30% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 3.50% [43]
C000054207 [Member] | Europe ex U K Equity [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 10.00% [41]
Percent of Total Long Exposure 1.90% [42]
Percent of Total Short Exposure (5.70%) [42]
Percent of Net Long Exposure 6.20% [43]
C000054207 [Member] | Developed Middle East Africa [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.00% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 0.00% [43]
C000054207 [Member] | U S Small Mid Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 21.90% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure (17.80%) [42]
Percent of Net Long Exposure 4.10% [43]
C000054207 [Member] | Asia Pacific ex Japan [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure (6.10%) [42]
Percent of Net Short Exposure (5.50%) [43]
C000054207 [Member] | Europe ex U K [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 2.00% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure (7.10%) [42]
Percent of Net Short Exposure (5.10%) [43]
C000054207 [Member] | North America ex U S [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 1.00% [41]
Percent of Total Long Exposure 4.60% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 5.60% [43]
C000054207 [Member] | Emerging Markets [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 0.60% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure 0.00% [42]
Percent of Net Long Exposure 0.60% [43]
C000054207 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 29.00% [44]
C000054207 [Member] | Defined Benefit Plan, Equity Securities, US, Large Cap [Member]  
Holdings [Line Items]  
Percent of Net Asset Value 30.20% [41]
Percent of Total Long Exposure 0.00% [42]
Percent of Total Short Exposure (25.80%) [42]
Percent of Net Long Exposure 4.40% [43]
C000054207 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Net Long Exposure 4.00% [45]
C000088951 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088951 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088951 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088951 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088951 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088951 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088951 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088951 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088951 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088951 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088951 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088951 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088951 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088951 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088951 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088951 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088951 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088951 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088951 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088951 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088951 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088951 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088951 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088951 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088951 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088951 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088951 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088951 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088951 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088951 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088951 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088951 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088951 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088951 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088951 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088951 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088951 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088951 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088951 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088951 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088951 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088952 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088952 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088952 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088952 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088952 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088952 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088952 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088952 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088952 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088952 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088952 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088952 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088952 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088952 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088952 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088952 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088952 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088952 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088952 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088952 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088952 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088952 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088952 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088952 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088952 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088952 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088952 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088952 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088952 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088952 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088952 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088952 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088952 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088952 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088952 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088952 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088952 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088952 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088952 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088952 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088952 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088953 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088953 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088953 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088953 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088953 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088953 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088953 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088953 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088953 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088953 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088953 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088953 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088953 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088953 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088953 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088953 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088953 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088953 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088953 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088953 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088953 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088953 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088953 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088953 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088953 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088953 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088953 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088953 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088953 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088953 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088953 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088953 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088953 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088953 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088953 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088953 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088953 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088953 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088953 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088953 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088953 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088954 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088954 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088954 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088954 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088954 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088954 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088954 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088954 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088954 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088954 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088954 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088954 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088954 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088954 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088954 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088954 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088954 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088954 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088954 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088954 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088954 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088954 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088954 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088954 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088954 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088954 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088954 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088954 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088954 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088954 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088954 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088954 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088954 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088954 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088954 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088954 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088954 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088954 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088954 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088954 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088954 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088955 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088955 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088955 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088955 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088955 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088955 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088955 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088955 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088955 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088955 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088955 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088955 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088955 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088955 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088955 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088955 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088955 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088955 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088955 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088955 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088955 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088955 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088955 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088955 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088955 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088955 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088955 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088955 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088955 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088955 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088955 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088955 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088955 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088955 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088955 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088955 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088955 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088955 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088955 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088955 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088955 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088956 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088956 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088956 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088956 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088956 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088956 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088956 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088956 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088956 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088956 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088956 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088956 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088956 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088956 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088956 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088956 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088956 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088956 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088956 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088956 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088956 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088956 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088956 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088956 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088956 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088956 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088956 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088956 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088956 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088956 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088956 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088956 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088956 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088956 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088956 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088956 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088956 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088956 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088956 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088956 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088956 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088957 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088957 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088957 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088957 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088957 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088957 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088957 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088957 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088957 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088957 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088957 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088957 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088957 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088957 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088957 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088957 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088957 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088957 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088957 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088957 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088957 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088957 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088957 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088957 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088957 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088957 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088957 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088957 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088957 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088957 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088957 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088957 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088957 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088957 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088957 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088957 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088957 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088957 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088957 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088957 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088957 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000088958 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000088958 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000088958 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000088958 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000088958 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000088958 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088958 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088958 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000088958 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000088958 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000088958 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000088958 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000088958 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000088958 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000088958 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088958 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000088958 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000088958 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000088958 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000088958 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000088958 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000088958 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088958 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000088958 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000088958 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088958 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000088958 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000088958 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000088958 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000088958 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000088958 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000088958 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000088958 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000088958 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000088958 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000088958 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000088958 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000088958 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000088958 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000088958 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000088958 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
C000119775 [Member] | Fitch, AA Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 8.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 8.80%
C000119775 [Member] | Fitch, A Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.80%
C000119775 [Member] | Fitch, BBB Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 26.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 26.80%
C000119775 [Member] | Not Rated [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 10.50%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 0.60%
C000119775 [Member] | Moody's, Aaa Rating [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 9.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 9.00%
C000119775 [Member] | Cash And Cash Equivalents Quality [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000119775 [Member] | Other [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000119775 [Member] | Heating Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure (2.50%)
Percent of Net Long Exposure 1.00%
C000119775 [Member] | Natural Gas [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 6.20%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 6.20%
C000119775 [Member] | Brent Crude [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 14.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 14.00%
C000119775 [Member] | Gold Sector [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.40%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 13.40%
C000119775 [Member] | WTI Crude Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.50%
C000119775 [Member] | Unleaded Gasoline [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.80%
C000119775 [Member] | Soybeans [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 5.00%
C000119775 [Member] | Corn [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000119775 [Member] | Live Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.90%
C000119775 [Member] | Copper COMEX [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 5.40%
Percent of Total Short Exposure (0.70%)
Percent of Net Long Exposure 4.70%
C000119775 [Member] | Gas Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 4.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 4.70%
C000119775 [Member] | Aluminum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.70%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.70%
C000119775 [Member] | Soybean Oil [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.50%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.50%
C000119775 [Member] | Silver [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 3.10%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 3.10%
C000119775 [Member] | Nickel [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000119775 [Member] | Soybean Meal [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.50%
Percent of Total Short Exposure (0.50%)
Percent of Net Long Exposure 2.00%
C000119775 [Member] | Zinc [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 2.00%
C000119775 [Member] | Coffee [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000119775 [Member] | Lean Hogs [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.80%
C000119775 [Member] | Feeder Cattle [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 1.60%
C000119775 [Member] | Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.80%
Percent of Total Short Exposure (1.80%)
Percent of Net Long Exposure 1.00%
C000119775 [Member] | Sugar [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 2.40%
Percent of Total Short Exposure (1.50%)
Percent of Net Long Exposure 0.90%
C000119775 [Member] | Platinum [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.90%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.90%
C000119775 [Member] | Cocoa [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.80%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.80%
C000119775 [Member] | Kansas Wheat [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.90%
Percent of Total Short Exposure (2.50%)
Percent of Net Short Exposure (0.60%)
C000119775 [Member] | Cotton [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 1.70%
Percent of Total Short Exposure (2.40%)
Percent of Net Short Exposure (0.70%)
C000119775 [Member] | Lead [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.70%
Percent of Total Short Exposure (1.70%)
Percent of Net Short Exposure (1.00%)
C000119775 [Member] | Other Investments [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 13.60%
Percent of Total Short Exposure (113.50%)
Percent of Net Short Exposure (99.90%)
C000119775 [Member] | Cash and Cash Equivalents [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 12.60%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 12.60%
C000119775 [Member] | US Government Debt Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 28.00%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 28.00%
C000119775 [Member] | Fixed Income Securities [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 97.20%
Percent of Total Short Exposure (9.80%)
Percent of Net Long Exposure 87.40%
C000119775 [Member] | Commodity Exposure [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 99.90%
C000119775 [Member] | Federal Agencies [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 0.30%
Percent of Total Short Exposure 0.00%
Percent of Net Long Exposure 0.30%
C000119775 [Member] | Non Fixed Income [Member]  
Holdings [Line Items]  
Percent of Total Long Exposure 113.50%
Percent of Total Short Exposure (13.60%)
Percent of Net Long Exposure 100.00%
[1] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[2] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[3] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[4] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[5] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[6] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[7] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[8] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[9] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[10] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[11] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[12] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[13] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[14] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[15] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[16] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[17] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[18] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[19] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[20] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[21] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[22] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[23] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[24] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[25] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[26] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[27] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[28] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[29] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[30] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[31] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[32] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[33] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[34] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[35] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[36] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[37] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[38] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[39] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[40] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.
[41] Represents the actively managed portion of the portfolio and for purposes of this presentation, components include the value of securities, less any securities sold short. The bond component will include any accrued interest amounts. This also reflects the equivalent exposure of certain derivative positions. These amounts may be negative from time to time.
[42] Represents the tactical overlay portion of the portfolio which is how the fund manages its exposure to markets and currencies through the use of derivative positions. Percentages reflect the equivalent exposure of those derivative positions.
[43] For purposes of this presentation, the components include the value of securities, less any securities sold short, and reflect the impact of the equivalent exposure of all derivative positions. These amounts may be negative from time to time. The bond component will include any accrued interest amounts.
[44] Other includes currency derivatives and/or the offsetting of the leverage produced by derivative positions.
[45] Cash & Cash Equivalents includes any cash, investments in money market funds, short-term securities, and other assets less liabilities.