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Stock-Based Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement, Noncash Expense [Abstract]  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity
Schedule of Stock Based Compensation Expense
Stock-based compensation expense consists of the following:
(In millions)For the Three Months Ended 
September 30,
For the Nine Months Ended 
September 30,
 2024202320242023
Stock options$8.3 $8.0 $24.7 $25.1 
Restricted stock units2.4 1.3 7.5 3.9 
Total$10.7 $9.3 $32.2 $29.0 
Schedule of Future Share-Based Compensation Cost Based on the stock-based awards that are currently outstanding, we expect to recognize the future stock-based compensation expense as follows:
(in millions)
YearTotal Projected
Stock-Based Compensation Expense
Remainder of 2024$10.9 
202513.5 
20267.4 
20271.1 
2028— 
Total$32.9