Net Assets in Liquidation - Additional Information (Detail) (USD $)	3 Months Ended						6 Months Ended
	Mar. 31, 2011 Trust	Sep. 30, 2013	Sep. 26, 2013	Sep. 30, 2013 Nova Scotia Matter [Member]	Sep. 30, 2013 Nova Scotia Notes [Member]	Sep. 26, 2013 Nova Scotia Notes [Member]	Sep. 30, 2013 Disputed Nova Scotia Claims [Member]	Sep. 30, 2013 Other Than Nova Scotia Matter [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
Disputed general unsecured claims	8,154,000,000	3,190,000,000						134,000,000
Litigation				2,680,000,000
Guarantee Claims					1,073,000,000
Claim filed by bankruptcy trustee							1,610,000,000
Claims filed by former beneficial owners of notes				378,000,000
Proposed allowance of guarantee claim						1,073,000,000
Proposed allowance of wind-down claim			$ 477,000,000