XML 65 R54.htm IDEA: XBRL DOCUMENT v3.21.2
Income (Loss) Per Share - Additional information (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2020
Employee Stock Option [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount 5.0 5.2 5.2