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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Additional Paid-In Capital
Translation Adjustments and Other
Net Unrealized Gain on Marketable Securities
Retained Earnings
Treasury Stock
Balance at beginning of period (in shares) at Dec. 31, 2023   385.4          
Balance at beginning of period at Dec. 31, 2023 $ 2,068.6 $ 0.4 $ 3,514.6 $ (17.0) $ 0.3 $ 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)   0.4          
Issuance of common stock for Employee Stock Purchase Plan 28.2   28.2        
Issuance of common stock in connection with achievement of sales-based 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
Purchases of treasury stock, including excise tax (in shares)   (10.4)          
Purchases of treasury stock, including excise tax (749.5)           (749.5)
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 127.1   127.1        
Net income 424.5         424.5  
Other comprehensive (loss) income, net of tax 80.1     77.8 2.3    
Balance at end of period (in shares) at Sep. 30, 2024   390.6          
Balance at end of period at Sep. 30, 2024 1,979.0 $ 0.4 2,050.5 60.8 2.6 1,445.9 (1,581.2)
Balance at beginning of period (in shares) at Jun. 30, 2024   400.7          
Balance at beginning of period at Jun. 30, 2024 2,434.3 $ 0.4 1,992.3 (36.0) (2.0) 1,311.3 (831.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of common stock for Employee Stock Purchase Plan (in shares)   0.3          
Issuance of common stock for Employee Stock Purchase Plan 14.8   14.8        
Purchases of treasury stock, including excise tax (in shares)   (10.4)          
Purchases of treasury stock, including excise tax (749.5)           (749.5)
Share-based compensation expense 43.4   43.4        
Net income 134.6         134.6  
Other comprehensive (loss) income, net of tax 101.4     96.8 4.6    
Balance at end of period (in shares) at Sep. 30, 2024   390.6          
Balance at end of period at Sep. 30, 2024 $ 1,979.0 $ 0.4 2,050.5 60.8 2.6 1,445.9 (1,581.2)
Balance at beginning of period (in shares) at Dec. 31, 2024 390.7 390.7          
Balance at beginning of period at Dec. 31, 2024 $ 2,102.6 $ 0.4 2,093.8 (8.4) 0.4 1,597.6 (1,581.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of common stock under equity incentive plans (in shares)   1.3          
Issuance of common stock for Employee Stock Purchase Plan (in shares)   0.4          
Issuance of common stock for Employee Stock Purchase Plan 28.1   28.1        
Purchases of treasury stock, including excise tax (in shares)   (2.4)          
Purchases of treasury stock, including excise tax (187.7)           (187.7)
Share-based compensation expense 124.6   124.6        
Net income 569.0         569.0  
Other comprehensive (loss) income, net of tax $ 89.5     88.3 1.2    
Balance at end of period (in shares) at Sep. 30, 2025 390.0 390.0          
Balance at end of period at Sep. 30, 2025 $ 2,726.1 $ 0.4 2,246.5 79.9 1.6 2,166.6 (1,768.9)
Balance at beginning of period (in shares) at Jun. 30, 2025   392.2          
Balance at beginning of period at Jun. 30, 2025 2,573.1 $ 0.4 2,187.5 83.5 0.1 1,882.8 (1,581.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Issuance of common stock for Employee Stock Purchase Plan (in shares)   0.2          
Issuance of common stock for Employee Stock Purchase Plan 13.9   13.9        
Purchases of treasury stock, including excise tax (in shares)   (2.4)          
Purchases of treasury stock, including excise tax (187.7)           (187.7)
Share-based compensation expense 45.1   45.1        
Net income 283.8         283.8  
Other comprehensive (loss) income, net of tax $ (2.1)     (3.6) 1.5    
Balance at end of period (in shares) at Sep. 30, 2025 390.0 390.0          
Balance at end of period at Sep. 30, 2025 $ 2,726.1 $ 0.4 $ 2,246.5 $ 79.9 $ 1.6 $ 2,166.6 $ (1,768.9)