XML 40 R30.htm IDEA: XBRL DOCUMENT v3.21.2
Stockholders' Equity - (Tables)
6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Employee Equity-Based Compensation Expense
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Total stock-based compensation expense
(selling, general and administrative and other operating charges, net)
$0.7 $3.4 $3.1 $4.8 
Income tax benefit related to stock-based compensation$0.2 $0.9 $0.8 $1.3 
Impact on cash flow due to taxes paid related to net share settlement of equity awards and proceeds from sale of stock under employee awards$0.1 $— $1.2 $0.7