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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Loss
Retained Earnings
Treasury Stock
Balance at beginning of period (in shares) at Dec. 31, 2022   386.3        
Balance at beginning of period at Dec. 31, 2022 $ 2,131.8 $ 0.4 $ 2,258.1 $ (11.6) $ 479.9 $ (595.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock under equity incentive plans (in shares)   1.2        
Issuance of common stock for Employee Stock Purchase Plan (in shares)   0.2        
Issuance of common stock for Employee Stock Purchase Plan 12.3   12.3      
Purchases of treasury stock, including excise tax (in shares)   (1.6)        
Purchases of treasury stock, including excise tax (189.1)         (189.1)
Purchase of capped call transactions, net of tax (76.3)   (76.3)      
Share-based compensation expense 74.9   74.9      
Net income 164.5       164.5  
Other comprehensive loss, net of tax (17.7)     (17.7)    
Balance at end of period (in shares) at Jun. 30, 2023   386.1        
Balance at end of period at Jun. 30, 2023 2,100.4 $ 0.4 2,269.0 (29.3) 644.4 (784.1)
Balance at beginning of period (in shares) at Mar. 31, 2023   387.6        
Balance at beginning of period at Mar. 31, 2023 2,233.0 $ 0.4 2,305.6 (6.5) 528.5 (595.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock under equity incentive plans (in shares)   0.1        
Purchases of treasury stock, including excise tax (in shares)   (1.6)        
Purchases of treasury stock, including excise tax (189.1)         (189.1)
Purchase of capped call transactions, net of tax (76.3)   (76.3)      
Share-based compensation expense 39.7   39.7      
Net income 115.9       115.9  
Other comprehensive loss, net of tax (22.8)     (22.8)    
Balance at end of period (in shares) at Jun. 30, 2023   386.1        
Balance at end of period at Jun. 30, 2023 $ 2,100.4 $ 0.4 2,269.0 (29.3) 644.4 (784.1)
Balance at beginning of period (in shares) at Dec. 31, 2023 385.4 385.4        
Balance at beginning of period at Dec. 31, 2023 $ 2,068.6 $ 0.4 3,514.6 (16.7) 1,021.4 (2,451.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise and settlement of warrants (in shares)   7.9        
Balance at end of period (in shares) at Mar. 31, 2024   396.1        
Balance at end of period at Mar. 31, 2024 $ 2,246.8 $ 0.4 2,510.6 (37.3) 1,167.8 (1,394.7)
Balance at beginning of period (in shares) at Dec. 31, 2023 385.4 385.4        
Balance at beginning of period at Dec. 31, 2023 $ 2,068.6 $ 0.4 3,514.6 (16.7) 1,021.4 (2,451.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Issuance of common stock under equity incentive plans (in shares)   1.2        
Issuance of common stock for Employee Stock Purchase Plan (in shares)   0.1        
Issuance of common stock for Employee Stock Purchase Plan 13.4   13.4      
Issuance of common stock in connection with achievement of regulatory approval milestone, net of issuance costs (in shares)   1.5        
Issuance of common stock in connection with achievement of sales-based milestone, net of issuance costs 0.0   (188.1)     188.1
Exercise and settlement of warrants (in shares)   12.5        
Exercise and settlement of warrants 0.0   (1,431.3)     1,431.3
Share-based compensation expense 83.7   83.7      
Net income 289.9       289.9  
Other comprehensive loss, net of tax $ (21.3)     (21.3)    
Balance at end of period (in shares) at Jun. 30, 2024 400.7 400.7        
Balance at end of period at Jun. 30, 2024 $ 2,434.3 $ 0.4 1,992.3 (38.0) 1,311.3 (831.7)
Balance at beginning of period (in shares) at Mar. 31, 2024   396.1        
Balance at beginning of period at Mar. 31, 2024 2,246.8 $ 0.4 2,510.6 (37.3) 1,167.8 (1,394.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise and settlement of warrants (in shares)   4.6        
Exercise and settlement of warrants 0.0   (563.0)     563.0
Share-based compensation expense 44.7   44.7      
Net income 143.5       143.5  
Other comprehensive loss, net of tax $ (0.7)     (0.7)    
Balance at end of period (in shares) at Jun. 30, 2024 400.7 400.7        
Balance at end of period at Jun. 30, 2024 $ 2,434.3 $ 0.4 $ 1,992.3 $ (38.0) $ 1,311.3 $ (831.7)