Consolidated Statements of Financial Condition (Unaudited) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Assets
Total assets	$ 142,588,330	$ 174,892,163
Liabilities:
Accrued redemptions	11,582,830	4,910,866
Total liabilities	11,582,830	4,910,866
Members' capital:
Members' capital	131,005,500	169,981,297
Total liabilities and members' capital	142,588,330	174,892,163
Blended Strategies Portfolio [Member]
Members' capital:
Members' capital	113,349,406	146,634,313
Blended Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	92,738,587	119,087,637
Blended Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	20,610,819	27,546,676
Systematic Strategies Portfolio [Member]
Members' capital:
Members' capital	17,656,094	23,346,984
Systematic Strategies Portfolio [Member] | Class 0 Units [Member]
Members' capital:
Members' capital	7,020,422	9,117,153
Systematic Strategies Portfolio [Member] | Class 2 Units [Member]
Members' capital:
Members' capital	10,635,672	14,229,831
Graham Alternative Investment Trading LLC [Member]
Assets
Investment, at fair value	113,349,406	146,634,313
Redemptions receivable	10,999,238	4,335,458
Graham Alternative Investment Trading II LLC [Member]
Assets
Investment, at fair value	17,656,094	23,346,984
Redemptions receivable	$ 583,592	$ 575,408