Restructuring and other (Tables)

3 Months Ended

Mar. 31, 2018

Restructuring and Related Activities [Abstract]

Schedule of Restructuring and Other Costs

The following table summarizes pre-tax restructuring and other costs for the periods presented:

	Three Months Ended March 31,
	2018		2017
Employee severance (1)	$	5.1	$	2.7
Acquisitions and related costs(2)	7.8		3.4
Contingent consideration adjustment(3)	18.0		—
Legal and related	16.0		—
Restructuring, integration and other	5.3		3.1
Total	$	52.2	$	9.2
(1) Inclusive of employee severance and termination costs associated with restructuring and integration activities.
(2) Three months ended March 31, 2018 includes $7.7 million related to the NYX acquisition.
(3) Represents contingent consideration fair value adjustment based on remeasurement as of March 31, 2018 (see Note 12).