Non-controlling Interest (Tables)

3 Months Ended

Mar. 31, 2016

Noncontrolling Interest [Abstract]

Noncontrolling Interest Disclosure

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 March 31, 2016 and December 31, 2015:

	March 31, 2016					December 31, 2015
$ in millions	Non-controlling Percentage		Non-controlling Equity			Non-controlling Percentage		Non-controlling Equity
OneBeacon Ltd.	23.9	%	$	243.4		24.5	%	$	245.6
SIG Preference Shares	100.0		250.0			100.0		250.0
Other, excluding mutuals and reciprocals
HG Global	3.1		17.2			3.1		17.1
MediaAlpha	40.0		14.2			40.0		14.4
Tranzact	36.8		79.7			36.8		79.4
Wobi	3.9		.5			3.9		.6
Dewar	30.1		3.2			19.0		3.7
Total other, excluding mutuals and reciprocals			114.8					115.2
Mutuals and reciprocals
BAM	100.0		(140.7		)	100.0		(140.0		)
SSIE	100.0		(16.1		)	100.0		(16.0		)
Total non-controlling interests			$	451.4				$	454.8