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Selected Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Selected Quartely Financial Data | SELECTED QUARTERLY FINANCIAL DATA (Unaudited) Selected quarterly financial data for 2013 and 2012 is shown in the following table. The quarterly financial data includes, in the opinion of management, all recurring adjustments necessary for a fair presentation of the results of operations for the interim periods. As a result of the Esurance Sale, AutoOne Sale and the Runoff Business sale, the results of operations for Esurance, AutoOne and the Runoff Business have been classified as discontinued operations and are now presented, net of related income taxes, as such in the statement of comprehensive income. Prior year amounts have been reclassified to conform to the current period’s presentation (see Note 21).
|  | 2013 Three Months Ended |  | 2012 Three Months Ended
Millions, except per share amounts |  | Dec. 31 |  | Sept. 30 |  | June 30 |  | Mar. 31 |  | Dec. 31 |  | Sept. 30 |  | June 30 |  | Mar. 31
Revenues |  | $ | 626.6 |  |  | $ | 574.1 |  |  | $ | 489.3 |  |  | $ | 627.4 |  |  | $ | 566.4 |  |  | $ | 697.4 |  |  | $ | 542.3 |  |  | $ | 629.7 |
Expenses |  | 492.4 |  |  | 518.8 |  |  | 485.7 |  |  | 475.6 |  |  | 617.2 |  |  | 562.3 |  |  | 504.7 |  |  | 488.8 |
Pre-tax income (loss) |  | 134.2 |  |  | 55.3 |  |  | 3.6 |  |  | 151.8 |  |  | (50.8 | ) |  | 135.1 |  |  | 37.6 |  |  | 140.9 |
Tax benefit (expense) |  | (27.4 | ) |  | (8.2 | ) |  | .6 |  |  | (41.6 | ) |  | 101.0 |  |  | (47.8 | ) |  | (6.4 | ) |  | (31.1 | )
Income (loss) from continuing operations |  | 106.8 |  |  | 47.1 |  |  | 4.2 |  |  | 110.2 |  |  | 50.2 |  |  | 87.3 |  |  | 31.2 |  |  | 109.8 |
Income (loss) from discontinued operations, net of tax |  | (.3 | ) |  | .4 |  |  | 3.9 |  |  | .5 |  |  | .5 |  |  | (106.8 | ) |  | .5 |  |  | (9.2 | )
Non-controlling interest in consolidated subsidiaries |  | (.3 | ) |  | 1.1 |  |  | 11.1 |  |  | .5 |  |  | 12.0 |  |  | 30.9 |  |  | (12.1 | ) |  | (16.8 | )
Equity in (loss) earnings of unconsolidated affiliates |  | 11.7 |  |  | 8.6 |  |  | 7.1 |  |  | 9.2 |  |  | 5.5 |  |  | 7.7 |  |  | 6.5 |  |  | 10.2 |
Income (loss) attributable to White Mountains’ common shareholders |  | $ | 117.9 |  |  | $ | 57.2 |  |  | $ | 26.3 |  |  | $ | 120.4 |  |  | $ | 68.2 |  |  | $ | 19.1 |  |  | $ | 26.1 |  |  | $ | 94.0 |
Income (loss) attributable to White Mountains’ common shareholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 19.14 |  |  | $ | 9.20 |  |  | $ | 3.62 |  |  | $ | 19.10 |  |  | $ | 10.36 |  |  | $ | 19.11 |  |  | $ | 3.85 |  |  | $ | 13.85 |
Discontinued operations |  | (.05 | ) |  | .06 |  |  | .64 |  |  | .07 |  |  | .07 |  |  | (16.21 | ) |  | .07 |  |  | (1.24 | )
Total consolidated operations |  | $ | 19.09 |  |  | $ | 9.26 |  |  | $ | 4.26 |  |  | $ | 19.17 |  |  | $ | 10.43 |  |  | $ | 2.90 |  |  | $ | 3.92 |  |  | $ | 12.61 |
Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 19.14 |  |  | $ | 9.20 |  |  | $ | 3.62 |  |  | $ | 19.10 |  |  | $ | 10.36 |  |  | $ | 19.11 |  |  | $ | 3.85 |  |  | $ | 13.85 |
Discontinued operations |  | (.05 | ) |  | .06 |  |  | .64 |  |  | .07 |  |  | .07 |  |  | (16.21 | ) |  | .07 |  |  | (1.24 | )
Total consolidated operations |  | $ | 19.09 |  |  | $ | 9.26 |  |  | $ | 4.26 |  |  | $ | 19.17 |  |  | $ | 10.43 |  |  | $ | 2.90 |  |  | $ | 3.92 |  |  | $ | 12.61 |
Adjusted book value per share |  | $ | 642.27 |  |  | $ | 621.56 |  |  | $ | 604.75 |  |  | $ | 606.20 |  |  | $ | 587.63 |  |  | $ | 573.66 |  |  | $ | 564.77 |  |  | $ | 565.38 |

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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