Net Assets in Liquidation - Allowed and Disputed General Unsecured Claims and Potential Term Loan Avoidance Action Claims (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Loss Contingencies [Line Items]
Beginning balance	$ 33,423,630,000	$ 33,423,630,000
New Allowed General Unsecured Claims	346,000	55,000
Disputed General Unsecured Claims resolved or disallowed	(20,000,000)
Term Loan Avoidance Action Claims resolved or disallowed	(741,000)	(55,000)
Ending balance	33,403,235,000	33,423,630,000
Allowed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	31,853,685,000	31,853,630,000
New Allowed General Unsecured Claims	346,000	55,000
Ending balance	31,854,031,000	31,853,685,000
Disputed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	70,000,000	70,000,000
Disputed General Unsecured Claims resolved or disallowed	(20,000,000)
Ending balance	50,000,000	70,000,000
Term Loan Avoidance Action Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,499,945,000	1,500,000,000
Term Loan Avoidance Action Claims resolved or disallowed	(741,000)	(55,000)
Ending balance	1,499,204,000	1,499,945,000
Maximum Amount of Unresolved Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,569,945,000	1,570,000,000
Disputed General Unsecured Claims resolved or disallowed	(20,000,000)
Term Loan Avoidance Action Claims resolved or disallowed	(741,000)	(55,000)
Ending balance	$ 1,549,204,000	$ 1,569,945,000