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Expense Example (Emerging Markets Value Trust, USD $)
12 Months Ended
May 01, 2011
Series I, Emerging Markets Value Trust
 
Expense Example:  
Year 1 $ 114
Year 3 356
Year 5 617
Year 10 1,363
Series II, Emerging Markets Value Trust
 
Expense Example:  
Year 1 134
Year 3 418
Year 5 723
Year 10 1,590
Series NAV, Emerging Markets Value Trust
 
Expense Example:  
Year 1 109
Year 3 340
Year 5 590
Year 10 $ 1,306