Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Statements of Changes in Net Assets in Liquidation (Liquidation Basis) [Abstract]
Net Assets in Liquidation, beginning of period	$ 1,007,366	$ 2,145,973	$ 1,369,239
Increases (decreases) in net assets in liquidation:
Transfer of interest in securities due from Motors Liquidation Company				9,900,699
Additions (net) to reserves for Expected Costs of Liquidation	(4,678)		(5,398)	(5,657)
Liquidating distributions of securities	(35,307)	(72,589)	(55,149)	(7,809,370)
Net change in fair value of holdings of New GM Securities	203,624	(899,766)	(246,323)	(912,083)
Interest and dividend income	20	20	73	49
Income tax (provision) benefit	(20,318)		88,265
Net increase (decrease) in net assets in liquidation	143,341	(972,335)	(218,532)	1,173,638
Net Assets in Liquidation, end of period	$ 1,150,707	$ 1,173,638	$ 1,150,707	$ 1,173,638