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Non-controlling Interest
 3 Months Ended
Mar. 31, 2018
Noncontrolling Interest [Abstract]  
Non-controlling Interests
Non-controlling Interests

Non-controlling interests consist of the ownership interests of non-controlling shareholders in consolidated entities and are presented separately on the balance sheet.
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, 2018 and December 31, 2017:
 
 
March 31, 2018
 
December 31, 2017
$ in millions
 
Non-controlling Percentage
 
Non-controlling Equity
 
Non-controlling Percentage
 
Non-controlling Equity
Other, excluding mutuals
 
 
 
 
 
 
 
 
HG Global
 
3.1
%
 
$
15.7

 
3.1
%
 
$
15.9

MediaAlpha
 
37.7

 
16.2

 
35.7

 
13.1

Buzzmove
 
22.9

 
2.4

 
22.9

 
2.5

Total other, excluding mutuals
 
 
 
34.3

 
 
 
31.5

Mutuals
 
 
 
 
 
 
 
 
BAM
 
100.0

 
(177.5
)
 
100.0

 
(163.2
)
Total non-controlling interests
 


 
$
(143.2
)
 
 
 
$
(131.7
)