Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Compensation Expense

Compensation expense related to stock-based awards was recorded as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2020		2019		2020		2019
Cost of revenue	$	0.1	$	0.3	$	0.3	$	0.9
Research and development expenses	2.3		2.2		7.3		6.4
Selling, general and administrative expenses	4.2		4.1		12.7		13.4
Total	$	6.6	$	6.6	$	20.3	$	20.7