Consolidated Statements of Financial Condition (Unaudited) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets
Total assets	$ 105,321,780	$ 117,691,901
Liabilities:
Accrued redemptions	2,104,730	9,538,847
Total liabilities	2,104,730	9,538,847
Members' capital:
Members' capital	103,217,050	108,153,054
Total liabilities and members' capital	105,321,780	117,691,901
Blended Strategies Portfolio [Member]
Members' capital:
Members' capital	90,965,780	93,947,400
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	72,192,800	75,558,523
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	18,772,980	18,388,877
Systematic Strategies Portfolio [Member]
Members' capital:
Members' capital	12,251,270	14,205,654
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	5,521,469	5,927,647
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	6,729,801	8,278,007
Graham Alternative Investment Trading LLC [Member]
Assets
Investment, at fair value	90,965,780	93,947,400
Redemptions receivable	1,472,716	8,364,780
Graham Alternative Investment Trading II LLC [Member]
Assets
Investment, at fair value	12,251,270	14,205,654
Redemptions receivable	$ 632,014	$ 1,174,067