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Stockholders' Equity - (Tables)
6 Months Ended
Jun. 30, 2022
Share-based Payment Arrangement [Abstract]  
Employee Equity-Based Compensation Expense
Quarter Ended June 30,Six Months Ended June 30,
2022202120222021
Total stock-based compensation expense
(selling, general and administrative and other operating charges, net)
$4.9 $0.7 $5.5 $3.1 
Income tax benefit related to stock-based compensation$1.2 $0.2 $1.4 $0.8 
Impact on cash flow due to taxes paid related to net share settlement of equity awards$1.0 $0.1 $2.5 $1.7