Net Assets in Liquidation - Schedule of GUC Trust Units (Detail)	3 Months Ended
	Sep. 30, 2013 Trust
Assets Net [Abstract]
Outstanding or issuable at June 30, 2013	30,282,801
Issued during the period	55,487
Less: Issuable at beginning of period	(55,487)
Add: Issuable at end of period	10,575
Outstanding or issuable at September 30, 2013	30,293,376