Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) (Liquidation Basis of Accounting [Member], USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Liquidation Basis of Accounting [Member]
Net Assets in Liquidation, beginning of period	$ 1,130,736,000	$ 1,624,717,000	$ 1,064,494,000	$ 1,390,181,000
Increase (decrease) in net assets in liquidation:
Net (additions to) reductions in reserves for Expected Costs of Liquidation (Note 7)	(2,291,000)	6,531,000	(4,135,000)	8,209,000
Liquidating distributions (Note 4)	(199,922,000)	(81,885,000)	(210,200,000)	(100,808,000)
Net change in fair value of holdings of New GM Securities	(181,941,000)	197,067,000	(112,911,000)	614,991,000
Dividends and interest income	3,456,000	13,000	12,790,000	40,000
Income tax benefit (Note 8)		331,015,000		164,845,000
Net (decrease) increase in net assets in liquidation	(380,698,000)	452,741,000	(314,456,000)	687,277,000
Net Assets in Liquidation, end of period	$ 750,038,000	$ 2,077,458,000	$ 750,038,000	$ 2,077,458,000