XML 21 R52.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Subsequent Events - Additional Information (Detail) (Subsequent Events [Member], USD $) In Millions, unless otherwise specified | 0 Months Ended
--- | ---
Apr. 03, 2014
Subsequent Event [Line Items] |
Debt amount percentage | 13.00%
United Guaranty [Member] |
Subsequent Event [Line Items] |
Amount paid by UGRIC | $ 17.7
WMMRC [Member] |
Subsequent Event [Line Items] |
Amount paid by UGRIC | $ 65.4

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

X
- Definition Amount Paid To Third Party Under Commutation Agreement + References No definition available. + Details
Name: | wmih_AmountPaidToThirdPartyUnderCommutationAgreement
Namespace Prefix: | wmih_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration