Net Assets in Liquidation - Additional Information (Detail) - USD ($)			12 Months Ended		38 Months Ended
	Feb. 01, 2019	Mar. 31, 2011	Mar. 31, 2019	Mar. 31, 2018	Jan. 31, 2019
Net Assets in Liquidation [Line Items]
Distributable Assets			$ 457,900,000
Cash and cash equivalents and marketable securities			505,100,000	$ 507,700,000
Distributable Cash set aside for projected Trust fees, costs and expenses			12,400,000
Distributable cash pending distribution or set aside and not available for distribution			14,200,000
Accrued investment income			30,300,000	16,700,000
Amount required to issue one Trust Unit per contingent rights		$ 1,000
Loss contingency Inestimable loss	$ 13,720,000
Expected distributions for expected new allowed general unsecured claims			68,500,000
Expected recoveries by the avoidance action trust and corresponding expected new allowed general unsecured claims			231,000,000
Appropriated distributable cash	13,720,000				$ 48,000,000
Avoidance Action Trust Proposed Agreement [Member]
Net Assets in Liquidation [Line Items]
Term Loan Avoidance Action Claims Allowed				1,400,000
Allowed and Disputed Claims [Member]
Net Assets in Liquidation [Line Items]
Loss contingency Inestimable loss	$ 13,720,000
Liquidation Basis of Accounting [Member]
Net Assets in Liquidation [Line Items]
Liquidating distributions payable			1,785,000	1,825,000
Accrued investment income			31,552,000	17,495,000
Reversal of contingent settlement obligation			$ (15,000,000)	15,000,000
Settlement payment obligation				$ 15,000,000