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Stock-Based Compensation
 6 Months Ended
Jun. 30, 2025
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
The Company's stock-based compensation expense for the three and six months ended June 30, 2025 and 2024 included PRSUs, RSUs and non-qualified stock options. 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)2025202420252024
PRSU expense$4.9 $4.5 $8.4 $8.6 
RSU expense4.6 4.5 8.9 9.0 
Option expense0.6 0.5 1.2 1.1 
Total stock-based compensation expense$10.1 $9.5 $18.5 $18.7 

The Company grants PRSUs to executive officers and certain members of management. Actual payout under the PRSUs is dependent upon the achievement of certain financial goals. During the first quarter of 2025, the Company granted PRSUs as a component of the long-term incentive plan ("2025 PRSUs"). The Company has recorded stock-based compensation expense related to the 2025 PRSUs during the three and six months ended June 30, 2025, as it was probable that the Company would achieve the specified performance targets for the performance period.