Segment Information

6 Months Ended

Jun. 30, 2011

Segment Reporting [Abstract]

Segment Information

Segment Information

White Mountains has determined that its reportable segments are OneBeacon, Sirius Group, and Other Operations. As a result of the Esurance Sale, the results of operations for Esurance are 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 14).

 White Mountains has made its segment determination based on consideration of the following criteria: (i) the nature of the business activities of each of the Company’s subsidiaries and affiliates; (ii) the manner in which the Company’s subsidiaries and affiliates are organized; (iii) the existence of primary managers responsible for specific subsidiaries and affiliates; and (iv) the organization of information provided to the chief operating decision makers and the Board of Directors.

 Significant intercompany transactions among White Mountains’ segments have been eliminated herein. Financial information for White Mountains’ segments follows:

Millions	OneBeacon			Sirius Group			Other Operations			Total
Three Months Ended June 30, 2012
Earned insurance and reinsurance premiums	$	282.0		$	230.2		$	—		$	512.2
Net investment income	14.0			17.1			9.3			40.4
Net realized and unrealized investment (losses) gains	(11.9		)	18.1			(14.3		)	(8.1		)
Other revenue	.2			(17.6		)	16.9			(.5		)
Total revenues	284.3			247.8			11.9			544.0
Losses and loss adjustment expenses	152.5			112.5			—			265.0
Insurance and reinsurance acquisition expenses	60.1			48.6			—			108.7
Other underwriting expenses	52.0			27.0			—			79.0
General and administrative expenses	2.6			6.2			33.3			42.1
Interest expense on debt	4.0			6.6			.3			10.9
Total expenses	271.2			200.9			33.6			505.7
Pre-tax income (loss)	$	13.1		$	46.9		$	(21.7	)	$	38.3

Millions	OneBeacon			Sirius Group			Other Operations			Total
Three Months Ended June 30, 2011
Earned insurance and reinsurance premiums	$	247.5		$	230.8		$	—		$	478.3
Net investment income	18.7			22.7			4.4			45.8
Net realized and unrealized investment gains	11.0			31.0			.8			42.8
Other revenue	(11.5		)	(9.5		)	7.7			(13.3		)
Total revenues	265.7			275.0			12.9			553.6
Losses and loss adjustment expenses	137.9			140.6			—			278.5
Insurance and reinsurance acquisition expenses	53.5			45.0			—			98.5
Other underwriting expenses	44.1			27.3			—			71.4
General and administrative expenses	2.6			9.2			44.4			56.2
Interest expense on debt	6.0			6.6			.3			12.9
Total expenses	244.1			228.7			44.7			517.5
Pre-tax income (loss)	$	21.6		$	46.3		$	(31.8	)	$	36.1

Millions	OneBeacon		Sirius Group		Other Operations			Total
Six Months Ended June 30, 2012
Earned insurance and reinsurance premiums	$	554.8	$	456.4	$	—		$	1,011.2
Net investment income	28.7		34.2		19.3			82.2
Net realized and unrealized investment gains	17.9		31.8		.8			50.5
Other revenue	.3		.7		29.7			30.7
Total revenues	601.7		523.1		49.8			1,174.6
Losses and loss adjustment expenses	301.8		225.9		—			527.7
Insurance and reinsurance acquisition expenses	117.5		99.6		—			217.1
Other underwriting expenses	100.8		53.0		—			153.8
General and administrative expenses	5.3		25.1		57.2			87.6
Interest expense on debt	8.1		13.1		.6			21.8
Total expenses	533.5		416.7		57.8			1,008.0
Pre-tax income (loss)	$	68.2	$	106.4	$	(8.0	)	$	166.6

Millions	OneBeacon			Sirius Group			Other Operations			Total
Six Months Ended June 30, 2011
Earned insurance and reinsurance premiums	$	492.6		$	453.5		$	—		$	946.1
Net investment income	39.7			46.2			9.4			95.3
Net realized and unrealized investment gains (losses)	34.1			(5.1		)	4.6			33.6
Other revenue	(10.7		)	15.4			3.5			8.2
Total revenues	555.7			510.0			17.5			1,083.2
Losses and loss adjustment expenses	268.3			368.6			—			636.9
Insurance and reinsurance acquisition expenses	102.5			86.7			—			189.2
Other underwriting expenses	93.4			51.1			—			144.5
General and administrative expenses	4.9			15.9			63.4			84.2
Interest expense on debt	12.3			13.1			.6			26.0
Total expenses	481.4			535.4			64.0			1,080.8
Pre-tax income (loss)	$	74.3		$	(25.4	)	$	(46.5	)	$	2.4