Liquidating Distributions - Additional Information (Detail) (USD $)	3 Months Ended				3 Months Ended
	Dec. 31, 2013	Mar. 31, 2011	Dec. 02, 2013 Nova Scotia Matter [Member]	Dec. 23, 2013 Special Excess Distribution [Member]	Dec. 31, 2013 Allowed General Unsecured Claims [Member]	Dec. 02, 2013 Allowed General Unsecured Claims [Member]	Dec. 31, 2013 New GM Common Stock [Member]	Dec. 23, 2013 New GM Common Stock [Member]	Dec. 02, 2013 New GM Common Stock [Member] Nova Scotia Matter [Member]	Dec. 31, 2013 New GM Series A Warrants [Member]	Dec. 23, 2013 New GM Series A Warrants [Member]	Dec. 02, 2013 New GM Series A Warrants [Member] Nova Scotia Matter [Member]	Dec. 31, 2013 New GM Series B Warrants [Member]	Dec. 23, 2013 New GM Series B Warrants [Member]	Dec. 02, 2013 New GM Series B Warrants [Member] Nova Scotia Matter [Member]
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Disputed General Unsecured Claims resolved or disallowed	$ 3,060,821,000
Disputed general unsecured claims		8,154,000,000				1,550,000,000
Cash distributions	$ 13,000		$ 527,500,000	$ 614,800,000
Settlement distribution									6,174,015			5,612,741			5,612,741
Special excess distribution								6,735,070			6,122,789			6,122,789
Settlement distribution of trust units			1,550,000
GUC Trust distribution obligation							93,738			85,178			85,178