Description of Trust and Reporting Policies (Policies)	6 Months Ended
Sep. 30, 2014
Accounting Policies [Abstract]
Basis of Presentation	The Motors Liquidation Company GUC Trust (“GUC Trust”) is a successor to Motors Liquidation Company (formerly known as General Motors Corp.) (“MLC”) for the purposes of Section 1145 of the United States Bankruptcy Code (“Bankruptcy Code”). The GUC Trust holds, administers and directs the distribution of certain assets pursuant to the terms and conditions of the Amended and Restated Motors Liquidation Company GUC Trust Agreement (the “GUC Trust Agreement”), dated as of June 11, 2012 and as amended from time to time, and pursuant to the Second Amended Joint Chapter 11 Plan (the “Plan”), dated March 18, 2011, of MLC and its debtor affiliates (collectively, along with MLC, the “Debtors”), for the benefit of holders of allowed general unsecured claims against the Debtors (“Allowed General Unsecured Claims”). The GUC Trust was formed on March 30, 2011, as a statutory trust under the Delaware Statutory Trust Act, for the purposes of implementing the Plan and distributing the GUC Trust’s distributable assets. Wilmington Trust Company serves as trustee and trust administrator of the GUC Trust (in such capacity, and not in its individual capacity, the “GUC Trust Administrator”), and FTI Consulting, Inc. serves as trust monitor of the GUC Trust (in such capacity, and not in its individual capacity, the “GUC Trust Monitor”). The Plan generally provides for the distribution of certain shares of common stock (“New GM Common Stock”) of the new General Motors Company, formerly known as NGMCO, Inc. (“New GM”) and any associated Dividend Cash (as defined below), and certain warrants for the purchase of shares of such stock (the “New GM Warrants,” and, together with the New GM Common Stock, the “New GM Securities”) to holders of Allowed General Unsecured Claims pro rata by the amount of such claims. In addition, the Plan provides that each holder of an Allowed General Unsecured Claim will obtain, in the form of GUC Trust Units (as defined below), a contingent right to receive, on a pro rata basis, additional shares of New GM Common Stock (and associated Dividend Cash) and New GM Warrants (if and to the extent such New GM Common Stock and New GM Warrants are not required for the satisfaction of previously Disputed General Unsecured Claims (as defined in Note 2) or liquidation for the payment of the expenses and liabilities of the GUC Trust) and certain cash, if any, remaining at the dissolution of the GUC Trust. The GUC Trust exists solely for the purpose of resolving claims, distributing New GM Securities (and associated Dividend Cash) and winding down the affairs of MLC, all in accordance with a plan of liquidation of MLC approved by the Bankruptcy Court. Accordingly, the GUC Trust has prepared the accompanying financial statements on the liquidation basis of accounting in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP). Under the liquidation basis of accounting as prescribed by the Financial Accounting Standards Board (FASB) Accounting Standards Codification, assets are stated at their estimated net realizable value, which is the non-discounted amount of cash into which an asset is expected to be converted during the liquidation period, while liabilities continue to be recognized at the amount required by other U.S. GAAP, and are not remeasured to reflect any anticipation that an entity will be legally released from an obligation. Additionally, under the liquidation basis of accounting, a reserve is established for estimated costs expected to be incurred during the liquidation period. Such costs are accrued when there is a reasonable basis for estimation. As described below, beginning in the quarter ended June 30, 2014, an accrual is made for estimated income or cash expected to be received over the liquidation period to the extent that a reasonable basis for estimation exists. These estimates are periodically reviewed and adjusted as appropriate. The valuation of assets at net realizable value, the accrual for dividends on the GUC Trust’s holdings of New GM Common Stock expected to be received over the liquidation period, reserves for residual wind-down claims and reserves for expected liquidation costs represent estimates, are based on present facts and circumstances known to the GUC Trust Administrator, and are subject to change. As described above, the beneficiaries of the GUC Trust are future holders and, to the extent their liquidating distributions have not yet been paid to them, current holders of Allowed General Unsecured Claims and future and current holders of GUC Trust Units (“Trust Beneficiaries”). As Disputed General Unsecured Claims are resolved and allowed and thereby become Allowed General Unsecured Claims, the holders thereof become entitled to receive liquidating distributions of New GM Securities (and the related Dividend Cash) and GUC Trust Units pro rata by the amount of such Claims and, upon such occurrence, the GUC Trust incurs an obligation to distribute such securities and cash. Accordingly, liquidating distributions payable are recorded (at the fair value of such New GM Securities and the related Dividend Cash) as of the end of the period in which the Disputed General Unsecured Claims are resolved as Allowed General Unsecured Claims. Similarly, to the extent potential Term Loan Avoidance Action Claims (as defined in Note 2) were to arise (and would become allowed) in the manner described in Note 2, liquidating distributions payable would be recorded for the New GM Securities and the related Dividend Cash (at fair value) that would become distributable to holders of Term Loan Avoidance Action Claims upon such occurrence. Prior to the resolution and allowance of Disputed General Unsecured Claims (or potential Term Loan Avoidance Action Claims), liabilities are not recorded for the conditional obligations associated with Disputed General Unsecured Claims. Rather, the beneficial interests of Trust Beneficiaries in the residual assets of the GUC Trust are reflected in Net Assets in Liquidation of the GUC Trust in the accompanying financial statements. The accompanying (a) condensed statement of net assets in liquidation at March 31, 2014, which has been derived from audited financial statements, and (b) the unaudited interim condensed financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all information and footnotes required by U.S. GAAP for complete financial statements. The GUC Trust believes all adjustments, normal and recurring in nature, considered necessary for a fair presentation have been included. The changes in net assets in liquidation for the six months ended September 30, 2014 are not necessarily indicative of the changes in net assets that may be expected for the full year. The GUC Trust believes that, although the disclosures contained herein are adequate to prevent the information presented from being misleading, the accompanying interim condensed financial statements should be read in conjunction with the GUC Trust’s financial statements for the year ended March 31, 2014 included in Form 10-K filed by the GUC Trust with the Securities and Exchange Commission on May 22, 2014. The preparation of condensed financial statements in conformity with U.S. GAAP requires the GUC Trust Administrator to make estimates and assumptions that affect the reported amounts of assets and liabilities and are subject to change.
Liquidation Basis of Accounting	Changes to U.S. GAAP are made by the FASB in the form of accounting standards updates (ASU’s) to the FASB’s Accounting Standards Codification. The GUC Trust considers the applicability and impact of all ASU’s. ASU’s not noted herein were assessed and determined to be not applicable. During the quarter ended June 30, 2014, the GUC Trust adopted Accounting Standards Update No. 2013-07, “Liquidation Basis of Accounting”. Such standard requires that income or cash expected to be received over the liquidation period be estimated and accrued to the extent that a reasonable basis for estimation exists. The effect of adoption of such standard was not material to the GUC Trust’s financial statements. As of September 30, 2014, the GUC Trust has accrued approximately $3.6 million for (a) dividends of approximately $3.5 million expected to be received by the GUC Trust on its holdings of New GM Common Stock and (b) approximately $130,000 expected to be earned on marketable securities over the estimated remaining liquidation period of the GUC Trust. Such accrued dividends consist of dividends of $0.30 per share declared by New GM in October 2014 payable to common stockholders of record as of December 10, 2014. No accrual has been made with respect to any additional dividends that may be declared by New GM in the future, because the GUC Trust believes that a reasonable basis for estimation of such potential dividends does not exist at this time.

The Motors Liquidation Company GUC Trust (“GUC Trust”) is a successor to Motors Liquidation Company (formerly known as General Motors Corp.) (“MLC”) for the purposes of Section 1145 of the United States Bankruptcy Code (“Bankruptcy Code”). The GUC Trust holds, administers and directs the distribution of certain assets pursuant to the terms and conditions of the Amended and Restated Motors Liquidation Company GUC Trust Agreement (the “GUC Trust Agreement”), dated as of June 11, 2012 and as amended from time to time, and pursuant to the Second Amended Joint Chapter 11 Plan (the “Plan”), dated March 18, 2011, of MLC and its debtor affiliates (collectively, along with MLC, the “Debtors”), for the benefit of holders of allowed general unsecured claims against the Debtors (“Allowed General Unsecured Claims”).

The GUC Trust was formed on March 30, 2011, as a statutory trust under the Delaware Statutory Trust Act, for the purposes of implementing the Plan and distributing the GUC Trust’s distributable assets. Wilmington Trust Company serves as trustee and trust administrator of the GUC Trust (in such capacity, and not in its individual capacity, the “GUC Trust Administrator”), and FTI Consulting, Inc. serves as trust monitor of the GUC Trust (in such capacity, and not in its individual capacity, the “GUC Trust Monitor”). The Plan generally provides for the distribution of certain shares of common stock (“New GM Common Stock”) of the new General Motors Company, formerly known as NGMCO, Inc. (“New GM”) and any associated Dividend Cash (as defined below), and certain warrants for the purchase of shares of such stock (the “New GM Warrants,” and, together with the New GM Common Stock, the “New GM Securities”) to holders of Allowed General Unsecured Claims pro rata by the amount of such claims. In addition, the Plan provides that each holder of an Allowed General Unsecured Claim will obtain, in the form of GUC Trust Units (as defined below), a contingent right to receive, on a pro rata basis, additional shares of New GM Common Stock (and associated Dividend Cash) and New GM Warrants (if and to the extent such New GM Common Stock and New GM Warrants are not required for the satisfaction of previously Disputed General Unsecured Claims (as defined in Note 2) or liquidation for the payment of the expenses and liabilities of the GUC Trust) and certain cash, if any, remaining at the dissolution of the GUC Trust.

The GUC Trust exists solely for the purpose of resolving claims, distributing New GM Securities (and associated Dividend Cash) and winding down the affairs of MLC, all in accordance with a plan of liquidation of MLC approved by the Bankruptcy Court. Accordingly, the GUC Trust has prepared the accompanying financial statements on the liquidation basis of accounting in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP). Under the liquidation basis of accounting as prescribed by the Financial Accounting Standards Board (FASB) Accounting Standards Codification, assets are stated at their estimated net realizable value, which is the non-discounted amount of cash into which an asset is expected to be converted during the liquidation period, while liabilities continue to be recognized at the amount required by other U.S. GAAP, and are not remeasured to reflect any anticipation that an entity will be legally released from an obligation. Additionally, under the liquidation basis of accounting, a reserve is established for estimated costs expected to be incurred during the liquidation period. Such costs are accrued when there is a reasonable basis for estimation. As described below, beginning in the quarter ended June 30, 2014, an accrual is made for estimated income or cash expected to be received over the liquidation period to the extent that a reasonable basis for estimation exists. These estimates are periodically reviewed and adjusted as appropriate. The valuation of assets at net realizable value, the accrual for dividends on the GUC Trust’s holdings of New GM Common Stock expected to be received over the liquidation period, reserves for residual wind-down claims and reserves for expected liquidation costs represent estimates, are based on present facts and circumstances known to the GUC Trust Administrator, and are subject to change.

As described above, the beneficiaries of the GUC Trust are future holders and, to the extent their liquidating distributions have not yet been paid to them, current holders of Allowed General Unsecured Claims and future and current holders of GUC Trust Units (“Trust Beneficiaries”). As Disputed General Unsecured Claims are resolved and allowed and thereby become Allowed General Unsecured Claims, the holders thereof become entitled to receive liquidating distributions of New GM Securities (and the related Dividend Cash) and GUC Trust Units pro rata by the amount of such Claims and, upon such occurrence, the GUC Trust incurs an obligation to distribute such securities and cash. Accordingly, liquidating distributions payable are recorded (at the fair value of such New GM Securities and the related Dividend Cash) as of the end of the period in which the Disputed General Unsecured Claims are resolved as Allowed General Unsecured Claims. Similarly, to the extent potential Term Loan Avoidance Action Claims (as defined in Note 2) were to arise (and would become allowed) in the manner described in Note 2, liquidating distributions payable would be recorded for the New GM Securities and the related Dividend Cash (at fair value) that would become distributable to holders of Term Loan Avoidance Action Claims upon such occurrence. Prior to the resolution and allowance of Disputed General Unsecured Claims (or potential Term Loan Avoidance Action Claims), liabilities are not recorded for the conditional obligations associated with Disputed General Unsecured Claims. Rather, the beneficial interests of Trust Beneficiaries in the residual assets of the GUC Trust are reflected in Net Assets in Liquidation of the GUC Trust in the accompanying financial statements.

The accompanying (a) condensed statement of net assets in liquidation at March 31, 2014, which has been derived from audited financial statements, and (b) the unaudited interim condensed financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all information and footnotes required by U.S. GAAP for complete financial statements. The GUC Trust believes all adjustments, normal and recurring in nature, considered necessary for a fair presentation have been included. The changes in net assets in liquidation for the six months ended September 30, 2014 are not necessarily indicative of the changes in net assets that may be expected for the full year. The GUC Trust believes that, although the disclosures contained herein are adequate to prevent the information presented from being misleading, the accompanying interim condensed financial statements should be read in conjunction with the GUC Trust’s financial statements for the year ended March 31, 2014 included in Form 10-K filed by the GUC Trust with the Securities and Exchange Commission on May 22, 2014.

The preparation of condensed financial statements in conformity with U.S. GAAP requires the GUC Trust Administrator to make estimates and assumptions that affect the reported amounts of assets and liabilities and are subject to change.