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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Additional Paid-In Capital
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Accumulated Deficit
Cumulative Effect, Period of Adoption, Adjustment
Balance (in shares) at Jan. 31, 2020   231,708            
Balance at Jan. 31, 2020   $ 231 $ 5,090,187   $ 0 $ 23,492 $ (2,627,359) $ (200)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   5 74,512          
Share-based compensation     486,841          
Exercise of convertible senior notes hedges     303,202   (303,201)      
Settlement of convertible senior notes   $ 2 (4)          
Other comprehensive income (loss) $ (22,846)         (22,846)    
Net income (loss) (186,384)           (186,384)  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   5,454            
Settlement of convertible senior notes (in shares)   1,654            
Purchase of treasury stock from the exercise of convertible senior notes hedges (in shares)   (1,655)            
Balance (in shares) at Jul. 31, 2020   237,161            
Balance at Jul. 31, 2020 2,838,478 $ 238 5,954,738   (303,201) 646 (2,813,943)  
Balance (in shares) at Apr. 30, 2020   235,170            
Balance at Apr. 30, 2020   $ 235 5,330,170   0 57,526 (2,785,927)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   1 70,939          
Share-based compensation     250,431          
Exercise of convertible senior notes hedges     303,202   (303,201)      
Settlement of convertible senior notes   $ 2 (4)          
Other comprehensive income (loss) (56,880)         (56,880)    
Net income (loss) (28,016)           (28,016)  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   1,992            
Settlement of convertible senior notes (in shares)   1,654            
Purchase of treasury stock from the exercise of convertible senior notes hedges (in shares)   (1,655)            
Balance (in shares) at Jul. 31, 2020   237,161            
Balance at Jul. 31, 2020 2,838,478 $ 238 5,954,738   (303,201) 646 (2,813,943)  
Balance (in shares) at Jan. 31, 2021   242,667            
Balance at Jan. 31, 2021 3,277,834 $ 242 6,254,936 $ (219,702) (12,384) (54,970) (2,909,990) $ 136,032
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   $ 6 74,481          
Share-based compensation     529,304          
Exercise of convertible senior notes hedges     50   (47)      
Settlement of convertible senior notes     (2)          
Other comprehensive income (loss) 10,820         10,820    
Net income (loss) 59,214           59,214  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   5,338            
Issuance of restricted stock awards (in shares)   82            
Balance (in shares) at Jul. 31, 2021   248,087            
Balance at Jul. 31, 2021 3,867,990 $ 248 6,639,067   (12,431) (44,150) (2,714,744)  
Balance (in shares) at Apr. 30, 2021   246,311            
Balance at Apr. 30, 2021   $ 246 6,298,516   (12,420) (60,421) (2,820,480)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes   $ 2 75,842          
Share-based compensation     264,699          
Exercise of convertible senior notes hedges     11   (11)      
Settlement of convertible senior notes     (1)          
Other comprehensive income (loss) 16,271         16,271    
Net income (loss) 105,736           105,736  
Issuance of common stock under employee equity plans, net of shares withheld for employee taxes (in shares)   1,776            
Balance (in shares) at Jul. 31, 2021   248,087            
Balance at Jul. 31, 2021 $ 3,867,990 $ 248 $ 6,639,067   $ (12,431) $ (44,150) $ (2,714,744)