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The Company and its Subsidiaries - Additional Information (Detail) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended | 0 Months Ended | 12 Months Ended | 0 Months Ended
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Dec. 31, 2013 Operations | Dec. 31, 2012 | Mar. 19, 2012 | Sep. 25, 2008 | Dec. 31, 2013 New WMI Shareholders [Member] | Dec. 31, 2013 Escrow Deposit [Member] | Dec. 31, 2013 WMI Holdings Corp. [Member] | Dec. 31, 2013 13% Senior First Lien Notes [Member] | Dec. 31, 2012 13% Senior First Lien Notes [Member] | Dec. 31, 2011 13% Senior First Lien Notes [Member] | Dec. 31, 2013 13% Senior Second Lien Notes [Member] | Dec. 31, 2012 First Lien Note [Member] | Jul. 17, 2012 WMMRC [Member] | Dec. 31, 2013 WMMRC [Member] Insurers | Jul. 17, 2012 Pmi [Member]
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operations | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets sold of WMB in exchange for payment |  |  |  | $ 1,880,000,000 |  |  |  |  |  |  |  |  |  |  |
Debtors field plan | Dec. 12, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan Effective Date | Mar. 19, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Claims distributed to parties-in-interest | 6,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash received from creditors | 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior credit facility | 125,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior credit facility for working capital | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior credit facility for acquisitions and originations | 100,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issued aggregate principal amount |  |  |  |  |  |  |  | 110,000,000 |  |  | 20,000,000 |  |  |  |
Debt amount percentage |  |  |  |  |  |  |  | 13.00% |  |  | 13.00% |  |  |  |
Common stock, shares issued | 201,842,351 | 201,156,078 |  |  | 194,670,501 | 5,329,499 | 200,000,000 |  |  |  |  |  |  |  |
Abandoned stock |  | 8,370,000,000 | 8,370,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Available and utilizable NOL | 5,960,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of primary mortgage insurers |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 |
Loss from contract termination |  | 6,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Amount paid by PMI |  |  |  |  |  |  |  |  |  |  |  |  | 30,700,000 |  | 49,000,000
Cash paid to stockholders |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |  |  |
Interest paid on Notes |  |  |  |  |  |  |  | 9,700,000 | 3,700,000 | 0 |  | 3,700,000 |  |  |
Principal payment on Notes |  |  |  |  |  |  |  |  |  |  |  | $ 21,300,000 |  |  |

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