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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 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 March 31,
(in millions)20222021
PRSU expense$8.3 $9.6 
Option expense— 0.4 
RSU/DSU expense5.5 5.1 
Total stock-based compensation expense$13.8 $15.1