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Expense Example (Optimized All Cap Trust, USD $)
12 Months Ended
May 01, 2011
Series I, Optimized All Cap Trust
 
Expense Example:  
Year 1 $ 78
Year 3 243
Year 5 422
Year 10 942
Series II, Optimized All Cap Trust
 
Expense Example:  
Year 1 98
Year 3 306
Year 5 531
Year 10 1,178
Series NAV, Optimized All Cap Trust
 
Expense Example:  
Year 1 73
Year 3 227
Year 5 395
Year 10 $ 883