XML 21 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investments in Unconsolidated Affiliates (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2014
Equity Method Investments and Joint Ventures [Abstract] |
Investments in and Advances to Affiliates | White Mountains’s investments in unconsolidated affiliates represent investments in other companies in which White Mountains has a significant voting and economic interest but does not control the entity.
Millions |  | September 30, 2014 |  | December 31, 2013
Symetra common shares |  | $ | 389.3 |  |  | $ | 360.9 |
Unrealized gains (losses) from Symetra’s fixed maturity portfolio |  | 20.5 |  |  | (43.6 | )
Carrying value of Symetra common shares |  | 409.8 |  |  | 317.3 |
Hamer |  | 3.7 |  |  | 4.1 |
Total investments in unconsolidated affiliates |  | $ | 413.5 |  |  | $ | 321.4 |
Schedule of Changes in Investments in Unconsolidated Affiliates | The following table summarizes amounts recorded by White Mountains relating to its investment in Symetra for the three and nine months ended September 30, 2014 and 2013:
|  | Three Months Ended |  | Three Months Ended
|  | September 30, 2014 |  | September 30, 2013
Millions |  | Common Shares |  | Warrants |  | Total |  | Common Shares |  | Warrants |  | Total
Carrying value of investment in Symetra at beginning of period |  | $ | 415.5 |  |  | $ | — |  |  | $ | 415.5 |  |  | $ | 326.0 |  |  | $ | — |  |  | $ | 326.0 |
Equity in earnings (1)(2) |  | 7.0 |  |  | — |  |  | 7.0 |  |  | 8.7 |  |  | — |  |  | 8.7 |
Equity in net unrealized losses from Symetra’s fixed maturity portfolio(3) |  | (10.7 | ) |  | — |  |  | (10.7 | ) |  | (7.7 | ) |  | — |  |  | (7.7 | )
Dividends received |  | (2.0 | ) |  | — |  |  | (2.0 | ) |  | (1.8 | ) |  | — |  |  | (1.8 | )
Increase in value of warrants |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Exercise of warrants |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Carrying value of investment in Symetra at end of period(4)(5) |  | $ | 409.8 |  |  | $ | — |  |  | $ | 409.8 |  |  | $ | 325.2 |  |  | $ | — |  |  | $ | 325.2 |
(1) Equity in earnings excludes tax expense of $0.5 and $0.6. (2) Equity in earnings includes $0.7 and $0.7 increase relating to the pre-tax amortization of the Symetra common share basis difference. (3) Net unrealized gains includes $3.1 and $3.1 increase relating to the pre-tax amortization of the Symetra common share basis difference. (4) Includes White Mountains’s equity in net unrealized gains (losses) from Symetra’s fixed maturity portfolio of $20.5 and $(25.5) as of September 30, 2014 and 2013, which excludes tax (expense) benefit of $(1.4) and $2.0. (5) The aggregate value of White Mountains’s investment in common shares of Symetra was $455.1 based upon the quoted market price of $22.70 per share at September 30, 2014.
|  | Nine Months Ended |  | Nine Months Ended
|  | September 30, 2014 |  | September 30, 2013
Millions |  | Common Shares |  | Warrants |  | Total |  | Common Shares |  | Warrants |  | Total
Carrying value of investment in Symetra at beginning of period |  | $ | 317.3 |  |  | $ | — |  |  | $ | 317.3 |  |  | $ | 351.2 |  |  | $ | 30.3 |  |  | $ | 381.5 |
Equity in earnings (1)(2) |  | 34.5 |  |  | — |  |  | 34.5 |  |  | 25.7 |  |  | — |  |  | 25.7 |
Equity in net unrealized gains (losses) from Symetra’s fixed maturity portfolio(3) |  | 64.0 |  |  | — |  |  | 64.0 |  |  | (88.2 | ) |  | — |  |  | (88.2 | )
Dividends received |  | (6.0 | ) |  | — |  |  | (6.0 | ) |  | (4.6 | ) |  | — |  |  | (4.6 | )
Increase in value of warrants |  | — |  |  | — |  |  | — |  |  | — |  |  | 10.8 |  |  | 10.8 |
Exercise of warrants |  | — |  |  | — |  |  | — |  |  | 41.1 |  |  | (41.1 | ) |  | — |
Carrying value of investment in Symetra at end of period(4)(5) |  | $ | 409.8 |  |  | $ | — |  |  | $ | 409.8 |  |  | $ | 325.2 |  |  | $ | — |  |  | $ | 325.2 |
(1) Equity in earnings excludes tax expense of $2.4 and $2.0. (2) Equity in earnings includes $2.2 and $2.2 increase relating to the pre-tax amortization of the Symetra common share basis difference. (3) Net unrealized gains includes $9.4 and $8.6 increase relating to the pre-tax amortization of the Symetra common share basis difference. (4) Includes White Mountains’s equity in net unrealized gains (losses) from Symetra’s fixed maturity portfolio of $20.5 and $(25.5) as of September 30, 2014 and 2013, which excludes tax (expense) benefit of $(1.4) and $2.0. (5) The aggregate value of White Mountains’s investment in common shares of Symetra was $455.1 based upon the quoted market price of $22.70 per share at September 30, 2014.

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

X
- Definition Tabular disclosure of investments in and advances to affiliates. Does not include the tabular disclosure of the disaggregation of investments in and advances to affiliates across legal entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 6 -Subparagraph (SX 210.12-14) -URI http://asc.fasb.org/extlink&oid=6955306&loc=d3e611322-123010 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 14 -Article 12 + Details
Name: | us-gaap_InvestmentsInAndAdvancesToAffiliatesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of changes in the investment in unconsolidated affiliates. + References No definition available. + Details
Name: | wtm_ScheduleOfChangesInInvestmentsInUnconsolidatedAffiliatesTableTextBlock
Namespace Prefix: | wtm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration