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Net Income (Loss) Per Share (Anti-Dilutive Shares Issuable) (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 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) 2.4   3.1 5.7
Anti-dilutive shares issuable (in shares) 28.1 22.4 25.4 18.9
Share purchase options        
Anti-dilutive shares issuable [Line Items]        
Anti-dilutive shares issuable (in shares) 23.7 18.6 21.7 16.0
Restricted Share Units (RSUs)        
Anti-dilutive shares issuable [Line Items]        
Anti-dilutive shares issuable (in shares) 1.8 1.7 1.0 0.9
Other issuable shares        
Anti-dilutive shares issuable [Line Items]        
Anti-dilutive shares issuable (in shares) 2.6 2.1 2.7 2.0