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Expense Example (Global Bond Trust, USD $)
12 Months Ended
May 01, 2011
Series I, Global Bond Trust
 
Expense Example:  
Year 1 $ 85
Year 3 265
Year 5 460
Year 10 1,025
Series II, Global Bond Trust
 
Expense Example:  
Year 1 105
Year 3 328
Year 5 569
Year 10 1,259
Series NAV, Global Bond Trust
 
Expense Example:  
Year 1 80
Year 3 249
Year 5 433
Year 10 $ 966