Non-controlling Interest (Tables)

9 Months Ended

Sep. 30, 2017

Noncontrolling Interest [Abstract]

Non-controlling Interests

The following table details the balance of non-controlling interests included in White Mountains’s total equity and the related percentage of each consolidated entity’s total equity owned by non-controlling shareholders as of September 30, 2017 and December 31, 2016:

	September 30, 2017					December 31, 2016
$ in millions	Non-controlling Percentage		Non-controlling Equity			Non-controlling Percentage		Non-controlling Equity
OneBeacon Ltd.	—	%	$	—		23.9	%	$	244.6
Other, excluding mutuals and reciprocals
HG Global	3.1		16.1			3.1		16.6
MediaAlpha	40.0		9.5			40.0		11.7
Buzzmove	22.9		3.0			29.1		2.9
Wobi	5.0		—			5.0		.1
Dewar (1)	—		—			18.8		3.9
Total other, excluding mutuals and reciprocals			28.6					35.2
Mutuals and reciprocals
BAM	100.0		(160.2		)	100.0		(150.9		)
SSIE	—		—			100.0		4.4
Total mutuals and reciprocals			(160.2		)			(146.5		)
Total non-controlling interests			$	(131.6	)			$	133.3

⁽¹⁾ Dewar is a subsidiary of OneBeacon.