Expense Example (­, (Lifestyle Conservative Trust), USD $)	0 Months Ended
	Jan. 13, 2014
Series I
Expense Example:
Expense Example, with Redemption, 1 Year	$ 76
Expense Example, with Redemption, 3 Years	237
Expense Example, with Redemption, 5 Years	416
Expense Example, with Redemption, 10 Years	936
Series II
Expense Example:
Expense Example, with Redemption, 1 Year	96
Expense Example, with Redemption, 3 Years	300
Expense Example, with Redemption, 5 Years	525
Expense Example, with Redemption, 10 Years	1,172
Series NAV
Expense Example:
Expense Example, with Redemption, 1 Year	70
Expense Example, with Redemption, 3 Years	221
Expense Example, with Redemption, 5 Years	389
Expense Example, with Redemption, 10 Years	$ 877