Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	1,017,733.911	875,825.668
Capital units, outstanding (in units)	1,017,733.911	875,825.668
Capital units, value (in dollars per unit)	$ 132.67	$ 138.96
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	282,211.421	230,452.833
Capital units, outstanding (in units)	282,211.421	230,452.833
Capital units, value (in dollars per unit)	$ 107.48	$ 113.68
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	147,976.309	122,899.506
Capital units, outstanding (in units)	147,976.309	122,899.506
Capital units, value (in dollars per unit)	$ 95.59	$ 102.92
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	148,825.658	86,626.635
Capital units, outstanding (in units)	148,825.658	86,626.635
Capital units, value (in dollars per unit)	$ 91.69	$ 99.72