XML 39 R28.htm IDEA: XBRL DOCUMENT v3.22.2
Stock-based Compensation (Tables)
 6 Months Ended
Jun. 30, 2022
Share-based Payment Arrangement [Abstract]  
Summary of stock-based compensation expense by line item
The following table summarizes the Company’s stock-based compensation expense by line item for the three and six months ended period presented in the condensed consolidated statements of operations (in millions):
Three months ended
June 30,
Six months ended
June 30,
2022202120222021
Research and development$8.2 $8.5 $15.2 $15.6 
Selling, general and administrative12.6 17.0 26.3 55.0 
Total $20.8 $25.5 $41.5 $70.6