Goodwill

6 Months Ended

Jun. 30, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill

In the first six months of 2019, there were no events or circumstances that would have required an interim impairment test. Annually, during the fourth quarter, goodwill is tested for impairment.

Changes in the carrying amount of goodwill for the six months ended June 30, 2019 were (in millions):

	Goodwill
Balance as of December 31, 2018	$	254.8
Measurement period adjustments	(1.6		)
Balance as of June 30, 2019	$	253.2