Annual Fund Operating Expenses (Total Return Trust)	12 Months Ended
	May 01, 2011
Series I, Total Return Trust
Operating Expenses:
Share Class	Series I
Management fee	0.68%
Distribution and service (12b-1) fees	0.05%
Other Expenses	0.04%
Total fund operating expenses	0.77%
Series II, Total Return Trust
Operating Expenses:
Share Class	Series II
Management fee	0.68%
Distribution and service (12b-1) fees	0.25%
Other Expenses	0.04%
Total fund operating expenses	0.97%
Series NAV, Total Return Trust
Operating Expenses:
Share Class	Series NAV
Management fee	0.68%
Distribution and service (12b-1) fees	none
Other Expenses	0.04%
Total fund operating expenses	0.72%