Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

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	HG Global		BAM(1)			MediaAlpha			Other Operations		Total
Three Months Ended September 30, 2017
Earned insurance premiums	$	1.8	$	.6		$	—		$	—	$	2.4
Net investment income	1.0		2.3			—			8.9		12.2
Net investment income (loss) - BAM Surplus Note interest	4.8		(4.8		)	—			—		—
Net realized and unrealized investment gains	.1		.7			—			31.7		32.5
Advertising and commission revenues	—		—			37.9			.9		38.8
Other revenue	—		.2			—			1.4		1.6
Total revenues	7.7		(1.0		)	37.9			42.9		87.5
Insurance acquisition expenses	.4		.5			—			—		.9
Other underwriting expenses	—		.1			—			—		.1
Cost of sales	—		—			32.2			.9		33.1
General and administrative expenses	.3		10.3			6.1			27.4		44.1
Interest expense	—		—			.1			.8		.9
Total expenses	.7		10.9			38.4			29.1		79.1
Pre-tax income (loss)	$	7.0	$	(11.9	)	$	(.5	)	$	13.8	$	8.4

⁽¹⁾ BAM manages its affairs on a statutory accounting basis. BAM’s statutory surplus includes surplus notes and is not reduced by accruals of interest expense on the surplus notes. BAM’s statutory surplus is reduced only after a payment of principal or interest has been approved by the New York Department of Financial Services.

	HG Global/BAM
Millions	HG Global		BAM(1)			MediaAlpha			Other Operations		Total
Nine Months Ended September 30, 2017
Earned insurance premiums	$	5.0	$	1.6		$	—		$	1.0	$	7.6
Net investment income	2.4		6.5			—			30.8		39.7
Net investment income (loss) - BAM Surplus Note interest	14.3		(14.3		)	—			—		—
Net realized and unrealized investment gains	.4		2.8			—			99.3		102.5
Advertising and commission revenues	—		—			101.2			2.7		103.9
Other revenue	—		.8			—			5.3		6.1
Total revenues	22.1		(2.6		)	101.2			139.1		259.8
Losses and loss adjustment expenses	—		—			—			1.1		1.1
Insurance acquisition expenses	1.0		2.0			—			.1		3.1
Other underwriting expenses	—		.3			—			—		.3
Cost of sales	—		—			86.0			2.7		88.7
General and administrative expenses	.8		30.7			17.9			112.8		162.2
Interest expense	—		—			.6			1.2		1.8
Total expenses	1.8		33.0			104.5			117.9		257.2
Pre-tax income (loss)	$	20.3	$	(35.6	)	$	(3.3	)	$	21.2	$	2.6

⁽¹⁾ BAM manages its affairs on a statutory accounting basis. BAM’s statutory surplus includes surplus notes and is not reduced by accruals of interest expense on the surplus notes. BAM’s statutory surplus is reduced only after a payment of principal or interest has been approved by the New York Department of Financial Services.

	HG Global/BAM
Millions	HG Global			BAM(1)			MediaAlpha			Other Operations			Total
Three Months Ended September 30, 2016
Earned insurance premiums	$	1.2		$	.3		$	—		$	1.9		$	3.4
Net investment income	.6			1.7			—			7.3			9.6
Net investment income (loss) - BAM Surplus Note interest	4.5			(4.5		)	—			—			—
Net realized and unrealized investment (losses) gains	(.3		)	(1.6		)	—			12.8			10.9
Advertising and commission revenues	—			—			27.6			.6			28.2
Other revenue	—			.4			—			4.3			4.7
Total revenues	6.0			(3.7		)	27.6			26.9			56.8
Losses and loss adjustment expenses	—			—			—			2.2			2.2
Insurance acquisition expenses	.2			.6			—			.5			1.3
Other underwriting expenses	—			.1			—			.1			.2
Cost of sales	—			—			23.0			1.0			24.0
General and administrative expenses	.6			9.3			5.7			26.8			42.4
Interest expense	—			—			.2			.3			.5
Total expenses	.8			10.0			28.9			30.9			70.6
Pre-tax income (loss)	$	5.2		$	(13.7	)	$	(1.3	)	$	(4.0	)	$	(13.8	)

⁽¹⁾ BAM manages its affairs on a statutory accounting basis. BAM’s statutory surplus includes surplus notes and is not reduced by accruals of interest expense on the surplus notes. BAM’s statutory surplus is reduced only after a payment of principal or interest has been approved by the New York Department of Financial Services.

	HG Global/BAM
Millions	HG Global		BAM(1)			MediaAlpha			Other Operations			Total
Nine Months Ended September 30, 2016
Earned insurance premiums	$	3.1	$	1.0		$	—		$	6.1		$	10.2
Net investment income	1.6		5.1			—			11.5			18.2
Net investment income (loss) - BAM Surplus Note interest	13.4		(13.4		)	—			—			—
Net realized and unrealized investment gains	2.3		6.5			—			18.4			27.2
Advertising and commission revenues	—		—			88.4			1.2			89.6
Other revenue	—		.8			—			17.2			18.0
Total revenues	20.4		—			88.4			54.4			163.2
Losses and loss adjustment expenses	—		—			—			6.8			6.8
Insurance acquisition expenses	.6		1.9			—			1.9			4.4
Other underwriting expenses	—		.3			—			.1			.4
Cost of sales	—		—			74.0			2.9			76.9
General and administrative expenses	1.4		28.1			16.3			99.1			144.9
Interest expense	—		—			.7			1.9			2.6
Total expenses	2.0		30.3			91.0			112.7			236.0
Pre-tax income (loss)	$	18.4	$	(30.3	)	$	(2.6	)	$	(58.3	)	$	(72.8	)

⁽¹⁾ BAM manages its affairs on a statutory accounting basis. BAM’s statutory surplus includes surplus notes and is not reduced by accruals of interest expense on the surplus notes. BAM’s statutory surplus is reduced only after a payment of principal or interest has been approved by the New York Department of Financial Services.