Segment Information

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Segment Informartion

Segment Information

White Mountains has determined that its reportable segments are OneBeacon, Sirius Group, HG Global/BAM and Other Operations.

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’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 March 31, 2015
Earned insurance and reinsurance premiums	$	286.6		$	205.0		$	.5	$	.2		$	2.0		$	494.3
Net investment income	10.5			8.0			.4		1.0			3.4			23.3
Net investment income (loss) - surplus note    interest	—			—			4.0		(4.0		)	—			—
Net realized and unrealized investment gains	14.2			79.9			1.1		3.0			5.2			103.4
Other (loss) revenue	(3.1		)	(27.4		)	—		.1			66.2			35.8
Total revenues	308.2			265.5			6.0		.3			76.8			656.8
Losses and LAE	165.9			97.5			—		—			2.0			265.4
Insurance and reinsurance acquisition expenses	51.0			42.6			.1		.8			1.1			95.6
Other underwriting expenses	55.9			25.5			—		.1			—			81.5
General and administrative expenses	4.1			6.2			.4		8.2			97.5			116.4
Interest expense	3.2			6.8			—		—			1.1			11.1
Total expenses	280.1			178.6			.5		9.1			101.7			570.0
Pre-tax income (loss)	$	28.1		$	86.9		$	5.5	$	(8.8	)	$	(24.9	)	$	86.8

						HG Global/BAM
Millions	OneBeacon		Sirius Group			HG		BAM			Other Operations			Total
Three Months Ended March 31, 2014
Earned insurance and reinsurance premiums	$	276.5	$	215.5		$	.2	$	.1		$	1.3		$	493.6
Net investment income	10.4		8.7			.3		1.4			3.9			24.7
Net investment income (loss) - surplus note    interest	—		—			3.9		(3.9		)	—			—
Net realized and unrealized investment gains	18.9		28.1			.7		3.0			13.1			63.8
Other revenue (loss)	1.0		(5.3		)	—		.2			.7			(3.4		)
Total revenues	306.8		247.0			5.1		.8			19.0			578.7
Losses and LAE	149.4		78.8			—		—			1.1			229.3
Insurance and reinsurance acquisition expenses	46.7		47.4			.1		.4			.5			95.1
Other underwriting expenses	49.4		31.8			—		.1			.1			81.4
General and administrative expenses	3.3		8.4			.4		8.9			29.3			50.3
Interest expense	3.2		6.6			—		—			.3			10.1
Total expenses	252.0		173.0			.5		9.4			31.3			466.2
Pre-tax income (loss)	$	54.8	$	74.0		$	4.6	$	(8.6	)	$	(12.3	)	$	112.5