Consolidated Statements of Financial Condition (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	1,060,331.414	875,825.668
Capital units, outstanding (in units)	1,060,331.414	875,825.668
Capital units, value (in dollars per unit)	$ 131.58	$ 138.96
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	285,219.624	230,452.833
Capital units, outstanding (in units)	285,219.624	230,452.833
Capital units, value (in dollars per unit)	$ 106.06	$ 113.68
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Capital units, issued (in units)	108,003.154	122,899.506
Capital units, outstanding (in units)	108,003.154	122,899.506
Capital units, value (in dollars per unit)	$ 89.38	$ 102.92
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Capital units, issued (in units)	179,758.341	86,626.635
Capital units, outstanding (in units)	179,758.341	86,626.635
Capital units, value (in dollars per unit)	$ 85.30	$ 99.72