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Stockholders' Equity - (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Employee Equity-Based Compensation Expense
Quarter Ended March 31,
20222021
Total stock-based compensation expense
(selling, general and administrative and other operating charges, net)
$0.7 $2.4 
Income tax benefit related to stock-based compensation$0.2 $0.6 
Impact on cash flow due to taxes paid related to net share settlement of equity awards$1.5 $1.6