Annual report pursuant to Section 13 and 15(d)

Earnings per share - Narrative (Details)

v3.20.4
Earnings per share - Narrative (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the calculation of diluted earnings per share 1.4 1.0
Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the calculation of diluted earnings per share 1.4 1.0
Restricted Share Units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from the calculation of diluted earnings per share 1.4 1.0