Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule Of Compensation Cost By Expense Category

The following table summarizes the stock-based compensation expense included in each of our operating expense categories:

	Three months ended March 31
(in millions)	2017		2016
Cost of revenue	$	2.1	$	2.0
Sales and marketing	0.7		0.5
General and administrative	2.5		1.5
Total stock-based compensation expense	$	5.3	$	4.0