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Stockholders' Equity - (Tables)
9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Employee Equity-Based Compensation Expense
Quarter Ended September 30,Nine Months Ended September 30,
2024202320242023
Total stock-based compensation expense$(0.9)$3.5 $7.2 $7.0 
Income tax benefit related to stock-based compensation$(0.5)$0.9 $0.8 $1.7 
Impact on cash flow from proceeds on options exercised$0.2 $— $1.3 $— 
Impact on cash flow due to taxes paid related to net share settlement of equity awards$0.1 $0.1 $4.1 $4.7