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Net Loss Per Share (Anti-Dilutive Shares Issuable) (Details) - shares
shares in Millions
3 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Anti-dilutive shares issuable [Line Items]    
Anti-dilutive shares excluded from calculation of diluted earnings per share due to net loss (in shares) 3.8 7.4
Anti-dilutive shares issuable (in shares) 22.4 15.3
Share purchase options    
Anti-dilutive shares issuable [Line Items]    
Anti-dilutive shares issuable (in shares) 19.6 13.4
Restricted Share Units (RSUs)    
Anti-dilutive shares issuable [Line Items]    
Anti-dilutive shares issuable (in shares) 0.1 0.0
Other issuable shares    
Anti-dilutive shares issuable [Line Items]    
Anti-dilutive shares issuable (in shares) 2.7 1.9