Non-controlling Interests (Tables)

3 Months Ended

Mar. 31, 2019

Noncontrolling Interest [Abstract]

Non-controlling Interests

The following table presents 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, 2019 and December 31, 2018:

	March 31, 2019					December 31, 2018
$ in Millions	Non-controlling Percentage		Non-controlling Equity			Non-controlling Percentage		Non-controlling Equity
Non-controlling interests, excluding BAM
HG Global	3.1	%	$	14.8		3.1	%	$	14.5
NSM	4.7		14.2			4.5		13.6
Other NSM	13.4		.2			13.4		.3
MediaAlpha	—		—			39.0		16.2
Other Operations	various		.9			various		1.1
Total, excluding BAM			30.1					45.7
BAM	100.0		(173.8		)	100.0		(170.6		)
Total non-controlling interests			$	(143.7	)			$	(124.9	)