Net Assets in Liquidation - Additional Information (Detail) (USD $)	12 Months Ended				0 Months Ended		12 Months Ended		12 Months Ended
	Mar. 31, 2014 Trust	Dec. 23, 2013 New GM Common Stock [Member]	Dec. 23, 2013 New GM Series A Warrants [Member]	Dec. 23, 2013 New GM Series B Warrants [Member]	Oct. 21, 2013 Nova Scotia Matter [Member]	Dec. 02, 2013 Nova Scotia Matter [Member]	Mar. 31, 2014 Nova Scotia Matter [Member] 8.375% guaranteed notes due December 7, 2015 [Member]	Oct. 21, 2013 Nova Scotia Matter [Member] 8.375% guaranteed notes due December 7, 2015 [Member]	Mar. 31, 2014 Nova Scotia Matter [Member] 8.875% guaranteed notes due July 10, 2023 [Member]	Oct. 21, 2013 Nova Scotia Matter [Member] 8.875% guaranteed notes due July 10, 2023 [Member]	Dec. 02, 2013 Nova Scotia Matter [Member] New GM Common Stock [Member]	Dec. 02, 2013 Nova Scotia Matter [Member] New GM Series A Warrants [Member]	Dec. 02, 2013 Nova Scotia Matter [Member] New GM Series B Warrants [Member]
Loss Contingencies [Line Items]
Number of Trust Units issued per thousand dollars of allowed general unsecured claims	1
Amount required to issue one Trust Unit per contingent rights	$ 1,000
Novia Scotia Claims guaranteed notes interest rate								8.375%		8.875%
Novia Scotia Claims guaranteed notes maturity date							Dec. 07, 2015		Jul. 10, 2023
Disputed General Unsecured Claims Allowed					$ 1,550,000,000
Settlement distribution											6,174,015	5,612,741	5,612,741
Special excess distribution		6,735,070	6,122,789	6,122,789
Settlement distribution of Trust Units						1,550,000