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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2014
Segment Reporting [Abstract] |
Financial information for White Mountains' segments | Significant intercompany transactions among White Mountains’s segments have been eliminated herein. Financial information for White Mountains’s segments follows:
|  |  |  |  |  | HG Global/BAM |  |  |  |
Millions |  | OneBeacon |  | Sirius Group |  | HG |  | BAM |  | Other Operations |  | Total
Three Months Ended September 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earned insurance and reinsurance premiums |  | $ | 305.4 |  |  | $ | 231.4 |  |  | $ | .4 |  |  | $ | .1 |  |  | $ | 1.3 |  |  | $ | 538.6 |
Net investment income |  | 10.4 |  |  | 9.8 |  |  | .4 |  |  | 1.4 |  |  | 2.7 |  |  | 24.7 |
Net investment income (loss) - surplus note interest |  | — |  |  | — |  |  | 3.9 |  |  | (3.9 | ) |  | — |  |  | — |
Net realized and unrealized investment (losses) gains |  | (16.0 | ) |  | 49.1 |  |  | (.5 | ) |  | (1.4 | ) |  | (10.4 | ) |  | 20.8 |
Other revenue |  | 1.3 |  |  | (22.8 | ) |  | — |  |  | .2 |  |  | 26.6 |  |  | 5.3 |
Total revenues |  | 301.1 |  |  | 267.5 |  |  | 4.2 |  |  | (3.6 | ) |  | 20.2 |  |  | 589.4 |
Losses and LAE |  | 185.2 |  |  | 103.6 |  |  | — |  |  | — |  |  | .3 |  |  | 289.1 |
Insurance and reinsurance acquisition expenses |  | 54.6 |  |  | 50.1 |  |  | — |  |  | .5 |  |  | .1 |  |  | 105.3 |
Other underwriting expenses |  | 51.2 |  |  | 29.7 |  |  | — |  |  | .1 |  |  | — |  |  | 81.0 |
General and administrative expenses |  | 2.4 |  |  | 6.3 |  |  | .4 |  |  | 8.9 |  |  | 51.3 |  |  | 69.3 |
Interest expense |  | 3.2 |  |  | 6.6 |  |  | — |  |  | — |  |  | .5 |  |  | 10.3 |
Total expenses |  | 296.6 |  |  | 196.3 |  |  | .4 |  |  | 9.5 |  |  | 52.2 |  |  | 555.0 |
Pre-tax income (loss) |  | $ | 4.5 |  |  | $ | 71.2 |  |  | $ | 3.8 |  |  | $ | (13.1 | ) |  | $ | (32.0 | ) |  | $ | 34.4 |
|  |  |  |  |  | HG Global/BAM |  |  |  |
Millions |  | OneBeacon |  | Sirius Group |  | HG |  | BAM |  | Other Operations |  | Total
Nine Months Ended September 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earned insurance and reinsurance premiums |  | $ | 872.8 |  |  | $ | 656.5 |  |  | $ | .9 |  |  | $ | .3 |  |  | $ | 5.1 |  |  | $ | 1,535.6 |
Net investment income |  | 32.1 |  |  | 30.3 |  |  | 1.0 |  |  | 4.2 |  |  | 10.5 |  |  | 78.1 |
Net investment income (loss) - surplus note interest |  | — |  |  | — |  |  | 11.8 |  |  | (11.8 | ) |  | — |  |  | — |
Net realized and unrealized investment gains |  | 24.8 |  |  | 135.6 |  |  | 1.1 |  |  | 5.4 |  |  | 31.6 |  |  | 198.5 |
Other revenue |  | 3.3 |  |  | (47.3 | ) |  | — |  |  | .5 |  |  | 51.8 |  |  | 8.3 |
Total revenues |  | 933.0 |  |  | 775.1 |  |  | 14.8 |  |  | (1.4 | ) |  | 99.0 |  |  | 1,820.5 |
Losses and LAE |  | 520.7 |  |  | 273.8 |  |  | — |  |  | — |  |  | 6.6 |  |  | 801.1 |
Insurance and reinsurance acquisition expenses |  | 150.9 |  |  | 146.3 |  |  | .2 |  |  | 1.4 |  |  | .5 |  |  | 299.3 |
Other underwriting expenses |  | 152.3 |  |  | 91.7 |  |  | — |  |  | .3 |  |  | — |  |  | 244.3 |
General and administrative expenses |  | 9.3 |  |  | 21.6 |  |  | 1.2 |  |  | 26.6 |  |  | 131.2 |  |  | 189.9 |
Interest expense |  | 9.7 |  |  | 19.8 |  |  | — |  |  | — |  |  | .9 |  |  | 30.4 |
Total expenses |  | 842.9 |  |  | 553.2 |  |  | 1.4 |  |  | 28.3 |  |  | 139.2 |  |  | 1,565.0 |
Pre-tax income (loss) |  | $ | 90.1 |  |  | $ | 221.9 |  |  | $ | 13.4 |  |  | $ | (29.7 | ) |  | $ | (40.2 | ) |  | $ | 255.5 |
|  |  |  |  |  | HG Global/BAM |  |  |  |
Millions |  | OneBeacon |  | Sirius Group |  | HG |  | BAM |  | Other Operations |  | Total
Three Months Ended September 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earned insurance and reinsurance premiums |  | $ | 278.9 |  |  | $ | 221.4 |  |  | $ | .1 |  |  | $ | — |  |  | $ | — |  |  | $ | 500.4 |
Net investment income |  | 10.1 |  |  | 13.5 |  |  | .2 |  |  | 1.1 |  |  | 2.4 |  |  | 27.3 |
Net investment income (loss) - surplus note interest |  | — |  |  | — |  |  | 10.1 |  |  | (10.1 | ) |  | — |  |  | — |
Net realized and unrealized investment gains (losses) |  | 17.0 |  |  | (24.7 | ) |  | .5 |  |  | 2.4 |  |  | 33.0 |  |  | 28.2 |
Other revenue |  | 5.5 |  |  | 16.8 |  |  | — |  |  | .2 |  |  | (4.3 | ) |  | 18.2 |
Total revenues |  | 311.5 |  |  | 227.0 |  |  | 10.9 |  |  | (6.4 | ) |  | 31.1 |  |  | 574.1 |
Losses and LAE |  | 167.8 |  |  | 110.5 |  |  | — |  |  | — |  |  | — |  |  | 278.3 |
Insurance and reinsurance acquisition expenses |  | 53.6 |  |  | 52.5 |  |  | .1 |  |  | .5 |  |  | — |  |  | 106.7 |
Other underwriting expenses |  | 46.8 |  |  | 33.5 |  |  | — |  |  | .1 |  |  | — |  |  | 80.4 |
General and administrative expenses |  | 4.1 |  |  | 7.5 |  |  | .3 |  |  | 8.1 |  |  | 21.5 |  |  | 41.5 |
Interest expense |  | 3.3 |  |  | 6.6 |  |  | — |  |  | — |  |  | 2.0 |  |  | 11.9 |
Total expenses |  | 275.6 |  |  | 210.6 |  |  | .4 |  |  | 8.7 |  |  | 23.5 |  |  | 518.8 |
Pre-tax income (loss) |  | $ | 35.9 |  |  | $ | 16.4 |  |  | $ | 10.5 |  |  | $ | (15.1 | ) |  | $ | 7.6 |  |  | $ | 55.3 |
|  |  |  |  |  | HG Global/BAM |  |  |  |
Millions |  | OneBeacon |  | Sirius Group |  | HG |  | BAM |  | Other Operations |  | Total
Nine Months Ended September 30, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earned insurance and reinsurance premiums |  | $ | 846.2 |  |  | $ | 646.9 |  |  | $ | .2 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,493.3 |
Net investment income |  | 30.9 |  |  | 38.0 |  |  | .7 |  |  | 3.3 |  |  | 11.6 |  |  | 84.5 |
Net investment income (loss) - surplus note interest |  | — |  |  | — |  |  | 30.2 |  |  | (30.2 | ) |  | — |  |  | — |
Net realized and unrealized investment gains (losses) |  | 19.9 |  |  | (4.9 | ) |  | (1.7 | ) |  | (8.1 | ) |  | 60.9 |  |  | 66.1 |
Other revenue |  | 30.1 |  |  | 11.3 |  |  | — |  |  | .3 |  |  | 5.2 |  |  | 46.9 |
Total revenues |  | 927.1 |  |  | 691.3 |  |  | 29.4 |  |  | (34.7 | ) |  | 77.7 |  |  | 1,690.8 |
Losses and LAE |  | 473.7 |  |  | 323.5 |  |  | — |  |  | — |  |  | — |  |  | 797.2 |
Insurance and reinsurance acquisition expenses |  | 160.9 |  |  | 119.0 |  |  | .1 |  |  | 1.0 |  |  | — |  |  | 281.0 |
Other underwriting expenses |  | 150.7 |  |  | 93.0 |  |  | — |  |  | .3 |  |  | — |  |  | 244.0 |
General and administrative expenses |  | 11.0 |  |  | 23.0 |  |  | 1.1 |  |  | 24.2 |  |  | 66.2 |  |  | 125.5 |
Interest expense |  | 9.8 |  |  | 19.7 |  |  | — |  |  | — |  |  | 2.9 |  |  | 32.4 |
Total expenses |  | 806.1 |  |  | 578.2 |  |  | 1.2 |  |  | 25.5 |  |  | 69.1 |  |  | 1,480.1 |
Pre-tax income (loss) |  | $ | 121.0 |  |  | $ | 113.1 |  |  | $ | 28.2 |  |  | $ | (60.2 | ) |  | $ | 8.6 |  |  | $ | 210.7 |

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