Liquidating Distributions - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Sep. 30, 2020
Distribution Made to Limited Partner [Line Items]
liquidating distributions payable to holders of Allowed General Unsecured Claims and GUC Trust Beneficiaries		$ 2.5
GUC Trust Units [Member]
Distribution Made to Limited Partner [Line Items]
Distributions returned on behalf of certain governmental entities and holders of Allowed General Unsecured Claims	$ 0.3
Distributions returned for Resolved Term Loan Avoidance Action Claims not deposited	$ 0.2
Distribution Made to Limited Partner		$ 300.0