XML 45 R32.htm IDEA: XBRL DOCUMENT
v2.4.1.9

The Company and its Subsidiaries - Additional Information (Detail) (USD $) | 12 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2014 Operations | Mar. 19, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 25, 2008
Related Party Transaction [Line Items] |  |  |  |  |
Assets sold of WMB in exchange for payment |  |  |  |  | $ 1,880,000,000 us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions
Debtors filed plan | Dec. 12, 2011 |  |  |  |
Plan Effective Date | Mar. 19, 2012 |  |  |  |
Claims distributed to parties-in-interest | 6,500,000,000 us-gaap_BankruptcyClaimsAmountPaidToSettleClaims |  |  |  |
Cash received from creditors | 75,000,000 us-gaap_ProceedsFromLoans |  |  |  |
Senior credit facility | 125,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |  |  |  |
Senior credit facility for working capital | 25,000,000 wmih_MaximumWorkingCapitalFacilityInCredit |  |  |  |
Senior credit facility for acquisitions and originations | 100,000,000 wmih_LineOfCreditFacilityAmountUsedForAcquisition |  |  |  |
Abandoned stock |  | 8,370,000,000 wmih_NonOperatingLossDueToAbandonOfStock |  | 8,370,000,000 wmih_NonOperatingLossDueToAbandonOfStock |
Available and utilizable NOL | 6,000,000,000 us-gaap_OperatingLossCarryforwards |  |  |  |
Number of operations | 1 wmih_NumberOfOperationsOperatedInRunoff |  |  |  |
Common stock, shares authorized | 500,000,000 us-gaap_CommonStockSharesAuthorized |  | 500,000,000 us-gaap_CommonStockSharesAuthorized |  |
Preferred stock, shares authorized | 5,000,000 us-gaap_PreferredStockSharesAuthorized |  | 5,000,000 us-gaap_PreferredStockSharesAuthorized |  |
Common stock, par value | $ 0.00001 us-gaap_CommonStockParOrStatedValuePerShare |  | $ 0.00001 us-gaap_CommonStockParOrStatedValuePerShare |  |
Preferred stock, par value | $ 0.00001 us-gaap_PreferredStockParOrStatedValuePerShare |  | $ 0.00001 us-gaap_PreferredStockParOrStatedValuePerShare |  |
Common stock shares issued to new shareholders | 194,670,501 wmih_SharesIssuedToIndividualShareHolders |  |  |  |
Disputed equity escrow shares | 5,329,499 wmih_DisputedEquityEscrowShares |  |  |  |
Shares remained in disputed equity escrow | 2,921,555 wmih_SharesToBeReleasedFromDisputedEquityEscrow |  |  |  |
Common stock, shares issued | 202,343,245 us-gaap_CommonStockSharesIssued |  | 201,842,351 us-gaap_CommonStockSharesIssued |  |
Issuance of preferred stock, net of offering costs, Shares | 1,000,000 us-gaap_PreferredStockSharesIssued |  | 0 us-gaap_PreferredStockSharesIssued |  |
Common stock, shares outstanding | 202,343,245 us-gaap_CommonStockSharesOutstanding |  | 201,842,351 us-gaap_CommonStockSharesOutstanding | 201,156,078 us-gaap_CommonStockSharesOutstanding |
Preferred stock, shares outstanding | 1,000,000 us-gaap_PreferredStockSharesOutstanding |  | 0 us-gaap_PreferredStockSharesOutstanding | 0 us-gaap_PreferredStockSharesOutstanding |
WMMRC [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Number of primary mortgage insurers | 7 wmih_NumberOfInsurers / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = wmih_WmmrcMember |  |  |  |
2012 Restricted Stock Unit Plan [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common stock shares issued on effective date | 200,000,000 wmih_StockAvailableForIssuanceDuringPeriodSharesPeriodIncreaseDecrease / us-gaap_AwardTypeAxis = wmih_TwoThousandAndTwelveRestrictedStockUnitPlanMember |  |  |  |
Common Stock [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Issuance of common stock, Shares |  | 200,000,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common Stock [Member] | New WMI Shareholders [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Issuance of common stock, Shares |  | 194,670,501 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_ConsolidationItemsAxis = wmih_ShareholdersMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common Stock [Member] | Escrow Deposit [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Issuance of common stock, Shares |  | 5,329,499 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_ConsolidationItemsAxis = wmih_EscrowDepositMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
13% Senior First Lien Notes [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Issued aggregate principal amount | 110,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = wmih_ThirteenPercentSeniorFirstLienNotesMember |  |  |  |
Debt instrument, interest rate, stated percentage | 13.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wmih_ThirteenPercentSeniorFirstLienNotesMember |  |  |  |
13% Senior Second Lien Notes [Member] |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Issued aggregate principal amount | $ 20,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = wmih_ThirteenPercentSeniorSecondLienNotesMember |  |  |  |
Debt instrument, interest rate, stated percentage | 13.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = wmih_ThirteenPercentSeniorSecondLienNotesMember |  |  |  |

X
- Definition Amount paid to settle bankruptcy claim. + References No definition available. + Details
Name: | us-gaap_BankruptcyClaimsAmountPaidToSettleClaims
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
Name: | us-gaap_OperatingLossCarryforwards
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Date the plan of reorganization is filed with the bankruptcy court, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56451-112766 + Details
Name: | us-gaap_PlanOfReorganizationDatePlansFiled
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the plan of reorganization is effective, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56451-112766 + Details
Name: | us-gaap_PlanOfReorganizationDatesPlanIsEffective
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
Name: | us-gaap_PreferredStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash received from principal payments made on loans related to operating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
Name: | us-gaap_ProceedsFromLoans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of reorganization value related to estimated net realizable value of asset dispositions. Reorganization value is the amount attributed to the reconstituted entity, as well as the expected net realizable value of those assets that will be disposed before reconstitution occurs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 05 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6458260&loc=d3e54813-112758 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=34712771&loc=d3e56239-112766 + Details
Name: | us-gaap_ReorganizationValueNetRealizableValueOfAssetDispositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disputed equity escrow shares. + References No definition available. + Details
Name: | wmih_DisputedEquityEscrowShares
Namespace Prefix: | wmih_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line of credit facility amount used for acquisition. + References No definition available. + Details
Name: | wmih_LineOfCreditFacilityAmountUsedForAcquisition
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum working capital facility in credit. + References No definition available. + Details
Name: | wmih_MaximumWorkingCapitalFacilityInCredit
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Non operating loss due to Abandon of stock. + References No definition available. + Details
Name: | wmih_NonOperatingLossDueToAbandonOfStock
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of insurers. + References No definition available. + Details
Name: | wmih_NumberOfInsurers
Namespace Prefix: | wmih_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of operations operated in runoff. + References No definition available. + Details
Name: | wmih_NumberOfOperationsOperatedInRunoff
Namespace Prefix: | wmih_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shares issued to individual share holders. + References No definition available. + Details
Name: | wmih_SharesIssuedToIndividualShareHolders
Namespace Prefix: | wmih_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Shares to be released from disputed equity escrow. + References No definition available. + Details
Name: | wmih_SharesToBeReleasedFromDisputedEquityEscrow
Namespace Prefix: | wmih_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Stock available for issuance during period shares period increase decrease. + References No definition available. + Details
Name: | wmih_StockAvailableForIssuanceDuringPeriodSharesPeriodIncreaseDecrease
Namespace Prefix: | wmih_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=wmih_TwoThousandAndTwelveRestrictedStockUnitPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wmih_ThirteenPercentSeniorFirstLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=wmih_ThirteenPercentSeniorSecondLienNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=wmih_WmmrcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |