Net Assets in Liquidation - Allowed and Disputed General Unsecured Claims and Potential Term Loan Avoidance Action Claims (Detail)	3 Months Ended
	Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items]
Beginning balance	$ 33,400,275,000
Disputed General Unsecured Claims resolved or disallowed	0
Term Loan Avoidance Action Claims resolved or disallowed	0
Ending balance	33,400,275,000
Allowed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	31,855,432,000
Disputed General Unsecured Claims resolved or disallowed	0
Term Loan Avoidance Action Claims resolved or disallowed	0
Ending balance	31,855,432,000
Disputed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	50,000,000
Disputed General Unsecured Claims resolved or disallowed	0
Term Loan Avoidance Action Claims resolved or disallowed	0
Ending balance	50,000,000
Term Loan Avoidance Action Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,494,843,000
Disputed General Unsecured Claims resolved or disallowed	0
Term Loan Avoidance Action Claims resolved or disallowed	0
Ending balance	1,494,843,000
Maximum Amount of Unresolved Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,544,843,000
Disputed General Unsecured Claims resolved or disallowed	0
Term Loan Avoidance Action Claims resolved or disallowed	0
Ending balance	$ 1,544,843,000