Statements of Net Assets in Liquidation (Liquidation Basis) (Liquidation Basis of Accounting [Member], USD $)	Mar. 31, 2015	Mar. 31, 2014
Liquidation Basis of Accounting [Member]
ASSETS
Cash and Cash Equivalents	$ 37,483,000	$ 14,932,000
Marketable Securities	30,944,000	44,382,000
Accrued Dividends on Holdings of New GM Common Stock	26,524,000
Holdings of New GM Securities (Note 6)	917,977,000	1,114,078,000
Other Assets and Deposits	1,038,000	1,502,000
TOTAL ASSETS	1,013,966,000	1,174,894,000
LIABILITIES
Accounts Payable and Other Liabilities	4,832,000	3,105,000
Liquidating Distributions Payable (Note 5)	7,714,000	42,111,000
Reserves for Residual Wind-Down Claims (Note 8)	25,406,000	28,698,000
Reserves for Expected Costs of Liquidation (Note 8)	31,278,000	36,486,000
TOTAL LIABILITIES	69,230,000	110,400,000
NET ASSETS IN LIQUIDATION (Note 4)	$ 944,736,000	$ 1,064,494,000