Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Goodwill and Intangible Assets

The following table presents the change in goodwill and other intangible assets:

	Three Months Ended March 31,
	2018								2017
Millions	Goodwill		Other intangible assets			Total			Goodwill		Other intangible assets			Total
Beginning balance	$	25.9	$	36.2		$	62.1		$	25.9	$	19.3		$	45.2
Amortization, including foreign currency translation	—		(2.9		)	(2.9		)	—		(2.3		)	(2.3		)
Ending balance	$	25.9	$	33.3		$	59.2		$	25.9	$	17.0		$	42.9

Schedule of Intangible Assets and Goodwill

The following table presents the goodwill and other intangible assets as of March 31, 2018 and December 31, 2017:

Millions	March 31, 2018			December 31, 2017
Goodwill
MediaAlpha	$	18.3		$	18.3
Other	7.6			7.6
Total goodwill	25.9			25.9
Other intangible assets
MediaAlpha	32.5			35.4
Other	.8			.8
Total other intangible assets	33.3			36.2
Total goodwill and other intangible assets	59.2			62.1
Goodwill and other intangible assets attributed to non-controlling interests	(21.1		)	(21.1		)
Goodwill and other intangible assets included in White Mountains’s common shareholders’ equity	$	38.1		$	41.0