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Expense Example (New Income Trust, USD $)
12 Months Ended
May 01, 2011
Series I, New Income Trust
 
Expense Example:  
Year 1 $ 74
Year 3 230
Year 5 401
Year 10 894
Series II, New Income Trust
 
Expense Example:  
Year 1 94
Year 3 293
Year 5 509
Year 10 1,131
Series NAV, New Income Trust
 
Expense Example:  
Year 1 68
Year 3 214
Year 5 373
Year 10 $ 835