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Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Financial information for White Mountains' segments

					Other
Millions	OneBeacon		Sirius Group		Operations		Total
Three months ended March 31, 2012
Earned insurance and reinsurance premiums	$	272.8	$	226.2	$	—	$	499.0
Net investment income	14.7		17.1		10.0		41.8
Net realized and unrealized investment gains	29.8		13.7		15.1		58.6
Other revenue	.1		18.3		12.8		31.2
Total revenues	317.4		275.3		37.9		630.6
Losses and loss adjustment expenses	149.3		113.4		—		262.7
Insurance and reinsurance acquisition expenses	57.4		51.0		—		108.4
Other underwriting expenses	48.8		26.0		—		74.8
General and administrative expenses	2.7		18.9		23.9		45.5
Interest expense on debt	4.1		6.5		.3		10.9
Total expenses	262.3		215.8		24.2		502.3
Pre-tax income	$	55.1	$	59.5	$	13.7	$	128.3

						Other
Millions	OneBeacon		Sirius Group			Operations			Total
Three months ended March 31, 2011
Earned insurance and reinsurance premiums	$	245.1	$	222.7		$	—		$	467.8
Net investment income	21.0		23.5			5.0			49.5
Net realized and unrealized investment gains (losses)	23.1		(36.1		)	3.8			(9.2		)
Other revenue	.8		24.9			(4.2		)	21.5
Total revenues	290.0		235.0			4.6			529.6
Losses and loss adjustment expenses	130.4		228.0			—			358.4
Insurance and reinsurance acquisition expenses	49.0		41.7			—			90.7
Other underwriting expenses	49.3		23.8			—			73.1
General and administrative expenses	2.3		6.7			19.0			28.0
Interest expense on debt	6.3		6.5			.3			13.1
Total expenses	237.3		306.7			19.3			563.3
Pre-tax income (loss)	$	52.7	$	(71.7	)	$	(14.7	)	$	(33.7	)

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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