Condensed Statements of Changes in Members' Capital (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Members’ capital start of period			$ 16,200,829
Members’ capital start of period (in Shares)			15,160.08
Member subscriptions			25,079,658	5,062,424
Member subscriptions (in Shares)			22,949.54	5,012.81
Member redemptions			(413,875)	(25,598)
Member redemptions (in Shares)			(378.91)	(25.00)
Net investment income (loss)	(360,490)	(106,598)	(674,339)	(194,759)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041	(1,024,129)	100,273	(464,428)	148,014
Members’ capital end of period	39,727,845	4,990,081	39,727,845	4,990,081
Members’ capital end of period (in Shares)	37,730.71	4,987.81	37,730.71	4,987.81
B0 Members [Member] | WC Diversified Series [Member]
Members’ capital start of period			7,562,143
Members’ capital start of period (in Shares)			7,030.08
Member subscriptions			14,542,679	1,535,000
Member subscriptions (in Shares)			13,239.24	1,514.35
Member redemptions			(371,760)
Member redemptions (in Shares)			(340.26)
Net investment income (loss)			(287,546)	(74,295)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(227,920)	37,892
Members’ capital end of period	21,217,596	1,498,597	21,217,596	1,498,597
Members’ capital end of period (in Shares)	19,929.06	1,514.35	19,929.06	1,514.35
Net asset value per unit start of period			1,075.684	1,000.000
Change in net asset value per unit			(11.028)	(10.403)
Net asset value per unit end of period	1,064.656	989.597	1,064.656	989.597
B2 Members [Member] | WC Diversified Series [Member]
Members’ capital start of period			8,628,060
Members’ capital start of period (in Shares)			8,120.00
Member subscriptions			10,536,979	3,517,424
Member subscriptions (in Shares)			9,710.30	3,488.46
Member redemptions			(42,115)	(25,598)
Member redemptions (in Shares)			(38.65)	(25.00)
Net investment income (loss)			(386,499)	(119,780)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(236,574)	109,386
Members’ capital end of period	18,499,851	3,481,432	18,499,851	3,481,432
Members’ capital end of period (in Shares)	17,791.65	3,463.46	17,791.65	3,463.46
Net asset value per unit start of period			1,062.568	1,000.000
Change in net asset value per unit			(22.763)	5.189
Net asset value per unit end of period	1,039.805	1,005.189	1,039.805	1,005.189
Sponsor B2[Member] | WC Diversified Series [Member]
Members’ capital start of period			10,626
Members’ capital start of period (in Shares)			10.00
Member subscriptions				10,000
Member subscriptions (in Shares)				10.00
Net investment income (loss)			(294)	(682)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			66	734
Members’ capital end of period	10,398	10,052	10,398	10,052
Members’ capital end of period (in Shares)	10.00	10.00	10.00	10.00
Net asset value per unit start of period			1,062.568	1,000.000
Change in net asset value per unit			(22.763)	5.189
Net asset value per unit end of period	1,039.805	1,005.189	1,039.805	1,005.189
WC Diversified Series [Member]
Members’ capital start of period			16,200,829
Members’ capital start of period (in Shares)			15,160.08
Member subscriptions			25,079,658	5,062,424
Member subscriptions (in Shares)			22,949.54	5,012.81
Member redemptions			(413,875)	(25,598)
Member redemptions (in Shares)			(378.91)	(25.00)
Net investment income (loss)			(674,339)	(194,757)
Total realized and unrealized gain (loss) allocated from AlphaMetrix WC Diversified Fund - MT0041			(464,428)	148,012
Members’ capital end of period	$ 39,727,845	$ 4,990,081	$ 39,727,845	$ 4,990,081
Members’ capital end of period (in Shares)	37,730.71	4,987.81	37,730.71	4,987.81