Consolidated Statements of Financial Condition (USD $)	Dec. 31, 2012	Dec. 31, 2011
Assets
Total assets	$ 117,691,901	$ 174,892,163
Liabilities:
Accrued redemptions	9,538,847	4,910,866
Total liabilities	9,538,847	4,910,866
Members' capital:
Members' capital	108,153,054	169,981,297
Total liabilities and members' capital	117,691,901	174,892,163
Blended Strategies Portfolio [Member]
Members' capital:
Members' capital	93,947,400	146,634,313
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	75,558,523	119,087,637
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	18,388,877	27,546,676
Systematic Strategies Portfolio [Member]
Members' capital:
Members' capital	14,205,654	23,346,984
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	5,927,647	9,117,153
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	8,278,007	14,229,831
Graham Alternative Investment Trading LLC [Member]
Assets
Investment, at fair value	93,947,400	146,634,313
Redemptions receivable	8,364,780	4,335,458
Graham Alternative Investment Trading II LLC [Member]
Assets
Investment, at fair value	14,205,654	23,346,984
Redemptions receivable	$ 1,174,067	$ 575,408