Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) (Liquidation Basis of Accounting [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Liquidation Basis of Accounting [Member]
Net Assets in Liquidation, beginning of period	$ 750,038	$ 2,077,458	$ 1,064,494	$ 1,390,181
Increase (decrease) in net assets in liquidation:
Net (additions to) reductions in reserves for Expected Costs of Liquidation (Note 7)	(3,200)	(646)	(7,335)	7,563
Liquidating distributions (Note 4)	2,090	(1,067,130)	(208,110)	(1,167,938)
Net change in fair value of holdings of New GM Securities	83,540	353,679	(29,371)	968,670
Dividends and interest income	3,444	16	16,234	56
Income tax (provision) benefit (Note 8)		(32,183)		132,662
Net increase (decrease) in net assets in liquidation	85,874	(746,264)	(228,582)	(58,987)
Net Assets in Liquidation, end of period	$ 835,912	$ 1,331,194	$ 835,912	$ 1,331,194