Holdings of New GM Securities (Tables)

12 Months Ended

Mar. 31, 2013

Holdings of New GM Securities [Abstract]

Holdings of securities for trust beneficiaries

	2013				2012
	Number		Fair Value (in thousands)		Number		Fair Value (in thousands)
New GM Common Stock		28,714,897	$	798,849		30,034,667	$	770,389
New GM Series A Warrants		26,104,257		484,492		27,304,086		454,067
New GM Series B Warrants		26,104,257		307,769		27,304,086		305,806
Total			$	1,591,110			$	1,530,262

Securities pending distribution or set aside

	2013				2012
	Number		Fair Value (in thousands)		Number		Fair Value (in thousands)
New GM Common Stock		8,380,831	$	233,155		3,311,164	$	84,931
New GM Series A Warrants		7,618,851		141,405		3,010,012		50,057
New GM Series B Warrants		7,618,851		89,826		3,010,012		33,712
Total			$	464,386			$	168,700