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Net Loss per Share - Additional Information (Details) - $ / shares
shares in Thousands
12 Months Ended
Jan. 31, 2022
Jun. 30, 2020
Jun. 30, 2019
Jan. 31, 2018
0.375% Convertible Senior Notes Due 2026        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Additionally shares underlying conversion option (in shares) 4,700      
Debt instrument, Initial conversion price per share (in dollars per share)   $ 296.4544    
0.375% Convertible Senior Notes Due 2026 | Maximum        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of shares subject to adjustment (in shares) 6,200      
0.125% Convertible Senior Notes Due 2025        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Additionally shares underlying conversion option (in shares) 5,000      
Debt instrument, Initial conversion price per share (in dollars per share)     $ 159.5965  
0.125% Convertible Senior Notes Due 2025 | Maximum        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of shares subject to adjustment (in shares) 6,800      
0.375% Convertible Senior Notes Due 2023        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Additionally shares underlying conversion option (in shares) 39      
Debt instrument, Initial conversion price per share (in dollars per share)       $ 44.5068
0.375% Convertible Senior Notes Due 2023 | Maximum        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Number of shares subject to adjustment (in shares) 100      
Common Stock | 0.375% Convertible Senior Notes Due 2026        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Debt instrument, Initial conversion price per share (in dollars per share) $ 296.45      
Common Stock | 0.125% Convertible Senior Notes Due 2025        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Debt instrument, Initial conversion price per share (in dollars per share) $ 159.60      
Common Stock | 0.375% Convertible Senior Notes Due 2023        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Additionally shares underlying conversion option (in shares) 132,088,000      
Debt instrument, Initial conversion price per share (in dollars per share) $ 44.51