Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net Assets in Liquidation, beginning of period	$ 1,624,717	$ 1,007,366	$ 1,390,181	$ 1,369,239
Increase (decrease) in net assets in liquidation:
Net reductions (additions) to reserves for Expected Costs of Liquidation (Note 7)	6,531	(4,678)	8,209	(5,398)
Liquidating distributions (Note 4)	(81,885)	(35,307)	(100,808)	(55,149)
Net change in fair value of holdings of New GM Securities	197,067	203,624	614,991	(246,323)
Interest and dividend income	13	20	40	73
Income tax benefit (provision) (Note 8)	331,015	(20,318)	164,845	88,265
Net increase (decrease) in net assets in liquidation	452,741	143,341	687,277	(218,532)
Net Assets in Liquidation, end of period	$ 2,077,458	$ 1,150,707	$ 2,077,458	$ 1,150,707