Debt (Tables)

3 Months Ended

Mar. 31, 2015

Debt Disclosure [Abstract]

Schedule of debt outstanding

White Mountains’s debt outstanding as of March 31, 2015 and December 31, 2014 consisted of the following:

Millions	March 31, 2015			December 31, 2014
2012 OBH Senior Notes, at face value	$	275.0		$	275.0
Unamortized original issue discount	(.3		)	(.3		)
2012 OBH Senior Notes, carrying value	274.7			274.7
SIG Senior Notes, at face value	400.0			400.0
Unamortized original issue discount	(.3		)	(.3		)
SIG Senior Notes, carrying value	399.7			399.7
WTM Bank Facility	—			—
Tranzact Bank Facility	71.9			68.7
Unamortized issuance cost	(1.3		)	(1.3		)
Tranzact Bank Facility, carrying value	70.6			67.4
Other debt	4.8			4.8
Total debt	$	749.8		$	746.6