Net Assets in Liquidation - Additional Information (Detail) - USD ($)			12 Months Ended
	Mar. 27, 2020	Mar. 31, 2011	Mar. 31, 2020	May 31, 2020	Jul. 01, 2019	Mar. 31, 2019
Net Assets in Liquidation [Line Items]
Distributable Assets			$ 349,400,000
Cash and cash equivalents and marketable securities			435,600,000			$ 505,100,000
Liquidating distributions payable			351,876,000			1,785,000
Distributable Cash set aside for projected Trust fees, costs and expenses			41,500,000
Distributable cash pending distribution or set aside and not available for distribution			44,000,000
Change in Future Investment Income			29,500,000
Amount required to issue one Trust Unit per contingent rights		$ 1,000
Settlement payment obligation			50,000,000
Distributions payable for new allowed general unsecured claims			68,500,000		$ 68,500,000
Recoveries by the avoidance action trust and corresponding new allowed general unsecured claims			231,000,000		$ 231,000,000
Loss Contingency Accrual, Payments			48,000,000
Noticing costs			2,000,000
Motion for Appropriation of Distributable Cash	$ 50,000,000
GUC Trust Units [Member]
Net Assets in Liquidation [Line Items]
Liquidating distributions payable			351,900,000
Liquidating distributions payable to Guc unit holders			349,400,000
Expected Distribution				$ 300,000,000
Accrued Future Investment Income			800,000			$ 30,300,000
Avoidance Action Trust [Member]
Net Assets in Liquidation [Line Items]
Resolved Term Loan Avoidance Action Claims distributions paid			$ 67,800,000