Debt (Tables)

9 Months Ended

Sep. 30, 2016

Debt Disclosure [Abstract]

Schedule of debt outstanding

White Mountains’s debt outstanding as of September 30, 2016 and December 31, 2015 consisted of the following:

Millions	September 30, 2016			Effective   Rate (1)	December 31, 2015			Effective   Rate (1)
WTM Bank Facility	$	—		N/A	$	50.0		3.9%
OBH Senior Notes, at face value	275.0			4.7%	275.0			4.7%
Unamortized original issue discount and debt issuance costs	(1.9		)		(2.1		)
OBH Senior Notes, carrying value	273.1				272.9
OneBeacon Bank Facility	—			N/A	—			N/A
MediaAlpha Bank Facility	15.6			5.8%	15.0			5.5%
Unamortized issuance cost	(.2		)		(.3		)
MediaAlpha Bank Facility, carrying value	15.4				14.7
Total debt	$	288.5			$	337.6

 ⁽¹⁾ Effective rate considers the effect of the debt issuance costs.