The Company and its Subsidiaries	6 Months Ended
Jun. 30, 2015
Accounting Policies [Abstract]
The Company and its Subsidiaries	Note 1: The Company and its Subsidiaries WMIH Corp. WMIH Corp. (“WMIH”) is a corporation duly organized and existing under the laws of the State of Delaware. On May 11, 2015, WMIH merged with its parent corporation, WMI Holdings Corp. (“WMIHC”), a Washington corporation, with WMIH as the surviving corporation in the merger (the “Merger”). The Merger occurred as part of the reincorporation of WMIHC to the State of Delaware effective May 11, 2015 (the “Reincorporation Date”). The complete Agreement and Plan of Merger, WMIH Corp. Amended and Restated Certificate of Incorporation, and WMIH Corp. Amended and Restated Bylaws were filed with the Securities and Exchange Commission (“SEC”) as Exhibits 2.1, 3.1 and 3.2 on Form 8-K12G3 on May 13, 2015, and are incorporated herein by reference. WMIH, formerly known as WMIHC and Washington Mutual, Inc. (“WMI”), is the direct parent of WM Mortgage Reinsurance Company, Inc. (“WMMRC”), a Hawaii corporation, and WMI Investment Corp. (“WMIIC”), a Delaware corporation. Upon emergence from bankruptcy on March 19, 2012 (the “Effective Date”), we had limited operations other than WMMRC’s legacy reinsurance business which is being operated in runoff and has not written any new business since September 26, 2008. We continue to operate WMMRC’s business in runoff mode and we are actively seeking acquisition opportunities across a broad array of industries. As of June 30, 2015, WMIH is authorized to issue up to 3,500,000,000 shares of common stock, and up to 10,000,000 shares of preferred stock (in one or more series), in each case with a par value of $0.00001 per share. As of June 30, 2015 and December 31, 2014, 206,168,035 and 202,343,245 shares, respectively, of WMIH’s common stock were issued and outstanding. As of June 30, 2015 and December 31, 2014, 1,000,000 shares of WMIH’s Series A Convertible Preferred Stock (the “Series A Preferred Stock”) were issued and outstanding. As of June 30, 2015 and December 31, 2014, 600,000 and zero shares, respectively, of WMIH’s Series B Redeemable Convertible Preferred Stock (the “Series B Preferred Stock”) were issued and outstanding. WMMRC WMMRC is a wholly-owned subsidiary of WMIH. Prior to August 2008 (at which time WMMRC became a direct subsidiary of WMI), WMMRC was a wholly-owned subsidiary of FA Out-of-State Holdings, Inc., a second-tier subsidiary of Washington Mutual Bank (“WMB”) and third-tier subsidiary of WMI. WMMRC is a pure captive insurance company domiciled in the State of Hawaii. WMMRC was incorporated on February 25, 2000, and received a Certificate of Authority, dated March 2, 2000, from the Insurance Commissioner of the State of Hawaii. WMMRC was originally organized to reinsure private mortgage insurance risk for seven primary mortgage insurers then offering private mortgage insurance on loans originated or purchased by former subsidiaries of WMI. The seven primary mortgage insurers are United Guaranty Residential Insurance Company (“UGRIC”), Genworth Mortgage Insurance Corporation (“GMIC”), Mortgage Guaranty Insurance Corporation (“MGIC”), PMI Mortgage Insurance Company (“PMI”), Radian Guaranty Incorporated (“Radian”), Republic Mortgage Insurance Company (“RMIC”) and Triad Guaranty Insurance Company (“Triad”). Due to the then deteriorating performance in the mortgage guarantee markets and the closure and receivership of WMB, the reinsurance agreements with each of the primary mortgage insurers were terminated or placed into runoff during 2008. The agreements with UGRIC and Triad were placed into runoff effective May 31, 2008. The agreements with all other primary mortgage insurers were placed into runoff effective September 26, 2008. As a result, effective September 26, 2008, WMMRC ceased assuming new mortgage risks from the primary carriers. Consequently, as of September 26, 2008 WMMRC’s continuing operations consisted solely of the runoff of coverage associated with mortgages placed with the primary mortgage carriers prior to September 26, 2008. In runoff, an insurer generally writes no new business but continues to service its obligations under in force policies and otherwise continues as a licensed insurer. Management does not believe any additional adjustments to the carrying values of assets and liabilities which were recorded at fair market value as a result of fresh start accounting as of March 19, 2012 are required as a result of WMMRC’s runoff status. The reinsurance agreements with Triad, PMI and UGRIC were commuted on August 31, 2009, October 2, 2012 and April 3, 2014, respectively. As a result, WMMRC’s continuing operations consist solely of the runoff of coverage associated with mortgages placed with 4 remaining carriers, GMIC, MGIC, Radian and RMIC. WMIIC WMIIC does not currently have any operations and is fully eliminated upon consolidation. Prior to September 26, 2008, WMIIC held a variety of securities and investments; however, such securities and investments have been liquidated and the value thereof distributed in connection with implementing the Company’s Seventh Amended Joint Plan of Affiliated Debtors Pursuant to Chapter 11 of the United States Bankruptcy Code (as modified, the “Plan”).

Note 1: The Company and its Subsidiaries

WMIH Corp.

WMIH Corp. (“WMIH”) is a corporation duly organized and existing under the laws of the State of Delaware. On May 11, 2015, WMIH merged with its parent corporation, WMI Holdings Corp. (“WMIHC”), a Washington corporation, with WMIH as the surviving corporation in the merger (the “Merger”). The Merger occurred as part of the reincorporation of WMIHC to the State of Delaware effective May 11, 2015 (the “Reincorporation Date”).

The complete Agreement and Plan of Merger, WMIH Corp. Amended and Restated Certificate of Incorporation, and WMIH Corp. Amended and Restated Bylaws were filed with the Securities and Exchange Commission (“SEC”) as Exhibits 2.1, 3.1 and 3.2 on Form 8-K12G3 on May 13, 2015, and are incorporated herein by reference.

WMIH, formerly known as WMIHC and Washington Mutual, Inc. (“WMI”), is the direct parent of WM Mortgage Reinsurance Company, Inc. (“WMMRC”), a Hawaii corporation, and WMI Investment Corp. (“WMIIC”), a Delaware corporation.

Upon emergence from bankruptcy on March 19, 2012 (the “Effective Date”), we had limited operations other than WMMRC’s legacy reinsurance business which is being operated in runoff and has not written any new business since September 26, 2008. We continue to operate WMMRC’s business in runoff mode and we are actively seeking acquisition opportunities across a broad array of industries.

As of June 30, 2015, WMIH is authorized to issue up to 3,500,000,000 shares of common stock, and up to 10,000,000 shares of preferred stock (in one or more series), in each case with a par value of $0.00001 per share. As of June 30, 2015 and December 31, 2014, 206,168,035 and 202,343,245 shares, respectively, of WMIH’s common stock were issued and outstanding. As of June 30, 2015 and December 31, 2014, 1,000,000 shares of WMIH’s Series A Convertible Preferred Stock (the “Series A Preferred Stock”) were issued and outstanding. As of June 30, 2015 and December 31, 2014, 600,000 and zero shares, respectively, of WMIH’s Series B Redeemable Convertible Preferred Stock (the “Series B Preferred Stock”) were issued and outstanding.

WMMRC

WMMRC is a wholly-owned subsidiary of WMIH. Prior to August 2008 (at which time WMMRC became a direct subsidiary of WMI), WMMRC was a wholly-owned subsidiary of FA Out-of-State Holdings, Inc., a second-tier subsidiary of Washington Mutual Bank (“WMB”) and third-tier subsidiary of WMI. WMMRC is a pure captive insurance company domiciled in the State of Hawaii. WMMRC was incorporated on February 25, 2000, and received a Certificate of Authority, dated March 2, 2000, from the Insurance Commissioner of the State of Hawaii.

WMMRC was originally organized to reinsure private mortgage insurance risk for seven primary mortgage insurers then offering private mortgage insurance on loans originated or purchased by former subsidiaries of WMI. The seven primary mortgage insurers are United Guaranty Residential Insurance Company (“UGRIC”), Genworth Mortgage Insurance Corporation (“GMIC”), Mortgage Guaranty Insurance Corporation (“MGIC”), PMI Mortgage Insurance Company (“PMI”), Radian Guaranty Incorporated (“Radian”), Republic Mortgage Insurance Company (“RMIC”) and Triad Guaranty Insurance Company (“Triad”).

Due to the then deteriorating performance in the mortgage guarantee markets and the closure and receivership of WMB, the reinsurance agreements with each of the primary mortgage insurers were terminated or placed into runoff during 2008. The agreements with UGRIC and Triad were placed into runoff effective May 31, 2008. The agreements with all other primary mortgage insurers were placed into runoff effective September 26, 2008. As a result, effective September 26, 2008, WMMRC ceased assuming new mortgage risks from the primary carriers. Consequently, as of September 26, 2008 WMMRC’s continuing operations consisted solely of the runoff of coverage associated with mortgages placed with the primary mortgage carriers prior to September 26, 2008. In runoff, an insurer generally writes no new business but continues to service its obligations under in force policies and otherwise continues as a licensed insurer. Management does not believe any additional adjustments to the carrying values of assets and liabilities which were recorded at fair market value as a result of fresh start accounting as of March 19, 2012 are required as a result of WMMRC’s runoff status. The reinsurance agreements with Triad, PMI and UGRIC were commuted on August 31, 2009, October 2, 2012 and April 3, 2014, respectively. As a result, WMMRC’s continuing operations consist solely of the runoff of coverage associated with mortgages placed with 4 remaining carriers, GMIC, MGIC, Radian and RMIC.

WMIIC

WMIIC does not currently have any operations and is fully eliminated upon consolidation. Prior to September 26, 2008, WMIIC held a variety of securities and investments; however, such securities and investments have been liquidated and the value thereof distributed in connection with implementing the Company’s Seventh Amended Joint Plan of Affiliated Debtors Pursuant to Chapter 11 of the United States Bankruptcy Code (as modified, the “Plan”).