Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expense

A summary of the Company's stock-based compensation expense is presented in the following table:

	Three Months Ended June 30,				Six Months Ended June 30,
(in millions)	2022		2021		2022		2021
PRSU expense	$	7.9	$	9.7	$	16.2	$	19.3
Option expense	—		0.4		—		0.8
RSU/DSU expense	5.1		5.0		10.7		10.1
Total stock-based compensation expense	$	13.0	$	15.1	$	26.9	$	30.2