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Debt | 9 Months Ended
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Sep. 30, 2014
Debt Disclosure [Abstract] |
Debt | Debt White Mountains’s debt outstanding as of September 30, 2014 and December 31, 2013 consisted of the following:
Millions |  | September 30, 2014 |  | December 31, 2013
2012 OBH Senior Notes, at face value |  | $ | 275.0 |  |  | $ | 275.0 |
Unamortized original issue discount |  | (.3 | ) |  | (.3 | )
2012 OBH Senior Notes, carrying value |  | 274.7 |  |  | 274.7 |
SIG Senior Notes, at face value |  | 400.0 |  |  | 400.0 |
Unamortized original issue discount |  | (.4 | ) |  | (.4 | )
SIG Senior Notes, carrying value |  | 399.6 |  |  | 399.6 |
WTM Bank Facility |  | — |  |  | — |
Old Lyme Note |  | 2.8 |  |  | 2.1 |
QuoteLab |  | 1.0 |  |  | — |
Total debt |  | $ | 678.1 |  |  | $ | 676.4 |
WTM Bank Facility On August 14, 2013, White Mountains entered into a revolving credit facility with a syndicate of lenders administered by Wells Fargo Bank, N.A., which has a total commitment of $425.0 million and has a maturity date of August 14, 2018 (the “WTM Bank Facility”). As of September 30, 2014, the WTM Bank Facility was undrawn. The WTM Bank Facility contains various affirmative, negative and financial covenants which White Mountains considers to be customary for such borrowings, including certain minimum net worth and maximum debt to capitalization standards. Failure to meet one or more of these covenants could result in an event of default, which ultimately could eliminate availability under these facilities and result in acceleration of principal repayment on any amounts outstanding. Debt Covenants At September 30, 2014, White Mountains was in compliance with all debt covenants.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20,22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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