Goodwill (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill.

Schedule of changes in the carrying amount of goodwill

	(in millions)
Balance at January 1, 2018	$	1,842.6
Acquisition		9.1
Effect of foreign currency translation		(1.3)
Balance at March 31, 2018	$	1,850.4