Plan of Liquidation (Details) (USD $)	1 Months Ended	12 Months Ended				1 Months Ended	24 Months Ended	1 Months Ended	24 Months Ended	1 Months Ended	24 Months Ended	3 Months Ended			3 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Jun. 30, 2013	Dec. 15, 2011	Mar. 31, 2011	Mar. 31, 2012 Common Stock [Member]	Mar. 31, 2013 Common Stock [Member]	Mar. 31, 2012 Series A Warrants [Member]	Mar. 31, 2013 Series A Warrants [Member]	Mar. 31, 2012 Series B Warrants [Member]	Mar. 31, 2013 Series B Warrants [Member]	Jun. 30, 2013 New GM Stock [Member]	Jun. 30, 2013 New GM Series A Warrants [Member]	Mar. 31, 2011 New GM Series A Warrants [Member]	Jun. 30, 2013 New GM Series B Warrants [Member]	Mar. 31, 2011 New GM Series B Warrants [Member]
Plan of Liquidation (Additional Textual) [Abstract]
Distributable assets number of securities called by warrants														136,363,635		136,363,635
Exercise price per share														$ 10.00		$ 18.33
Number of securities sold to fund costs and expenses							902,228		820,205		820,205
Tax basis of securities held per security												$ 19.87	$ 11.38		$ 7.88
Number of securities sold to fund avoidance action trust costs						269,422		244,929		244,929
Plan of Liquidation (Textual) [Abstract]
Allowed General Unsecured Claims					$ 29,771,000,000
Disputed general unsecured claims			3,400,000,000		8,154,000,000
Total aggregate amount of general unsecured claims, both allowed and disputed inclusive of potential term loan avoidance action claims					39,425,000,000
Amount of term loan avoidance action					1,500,000,000
Distributable assets new GM shares					150,000,000
Allowed general unsecured claims threshold					35,000,000,000
Potential additional shares to be issued					30,000,000
Allowed general unsecured claims maximum excess amount					7,000,000,000
Additional shares issued					0
Contribution from MLC					52,700,000
Sales of New GM Securities aggregated		50,200,000
New GM Securities with an aggregate fair market value			25,600,000
New GM Securities reserved and set aside for potential Taxes on Distribution			581,300,000
Tax basis on securities held			1,067,000,000
Proceeds from liquidation of securities to fund avoidance action trust costs	13,700,000
Residual Wind-Down assets				42,800,000
Residual Wind-Down Assets Cash				38,600,000
Residual wind-down assets transferred benefit in prepaid expenses				2,800,000
Cash received to fund Avoidance Action Defense Costs				1,400,000
Cash received for funding Indenture Trustee Fiscal and Paying Agent Costs and Reporting Costs				3,400,000
Cash received for funding Indenture Trustee Fiscal and Paying Agent Costs				$ 1,400,000