Debt (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Schedule of debt outstanding

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

Millions	March 31, 2016			Effective   Rate (1)	December 31, 2015			Effective   Rate (1)
WTM Bank Facility	$	150.0		N/A	$	50.0		N/A
OBH Senior Notes, at face value	275.0			4.7%	275.0			4.7%
Unamortized original issue discount and debt issuance costs	(2.1		)		(2.1		)
OBH Senior Notes, carrying value	272.9				272.9
OneBeacon Bank Facility	—			N/A	—			N/A
Tranzact Bank Facility	94.1			6.0%	104.7			5.6%
Unamortized issuance cost	(1.6		)		(1.8		)
Tranzact Bank Facility, carrying value	92.5				102.9
MediaAlpha Bank Facility	17.5			6.4%	15.0			5.5%
Unamortized issuance cost	(.3		)		(.3		)
MediaAlpha Bank Facility, carrying value	17.2				14.7
Total debt	$	532.6			$	440.5

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