Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2015

Discontinued Operations and Disposal Groups [Abstract]

Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet And Additional Disclosures

The following table outlines the computation of earnings per share for discontinued operations for the three and six months endedJune 30, 2015 and 2014:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2015			2014			2015			2014
Basic and diluted earnings per share numerators (in millions):
Net income attributable to White Mountains’s common shareholders	$	(.3	)	$	2.6		$	7.6		$	2.1
Allocation of income for participating unvested restricted common shares(1)	—			—			(.1		)	—
Net income attributable to White Mountains’s common shareholders,    net of restricted common share amounts (2)	$	(.3	)	$	2.6		$	7.5		$	2.1
Basic earnings per share denominators (in thousands):
Total average common shares outstanding during the period	5,985.7			6,162.2			5,982.1			6,166.0
Average unvested restricted common shares(3)	(71.4		)	(81.3		)	(65.2		)	(75.9		)
Basic earnings per share denominator	5,914.3			6,080.9			5,916.9			6,090.1
Diluted earnings per share denominator (in thousands):
Total average common shares outstanding during the period	5,985.7			6,162.2			5,982.1			6,166.0
Average unvested restricted common shares(3)	(71.4		)	(81.3		)	(65.2		)	(75.9		)
Average outstanding dilutive options to acquire common shares(4)	—			—			—			—
Diluted earnings per share denominator	5,914.3			6,080.9			5,916.9			6,090.1
Basic and diluted earnings per share (in dollars):	$	(.04	)	$	.43		$	1.27		$	.34

⁽¹⁾ Restricted shares issued by White Mountains contain dividend participation features, and therefore, are considered participating securities.

⁽²⁾ Net earnings attributable to White Mountains’s common shareholders, net of restricted share amounts, is equal to undistributed earnings for the three and six months endedJune 30, 2015 and 2014.

⁽³⁾ Restricted common shares outstanding vest either in equal annual installments or upon a stated date. (See Note 15 - “Employee Share-Based Compensation Plans”).

⁽⁴⁾ The diluted earnings per share denominator for the three and six months endedJune 30, 2015 and 2014 does not include the impact of 125,000 common shares issuable upon exercise of the non-qualified options outstanding as they are anti-dilutive to the calculation.