v3.20.4
Equity - Stock Options (Details)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
May 08, 2020
shares
Allergan plc        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options issued to Allergan's equity award holders (in shares) | shares       11,200
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Contractual term 10 years      
Incremental vesting 0.33      
Vesting period 3 years      
Exercise price for awards granted as percentage of market value on the date of grant 100.00%      
Weighted-average grant-date fair value of the stock options granted (in dollars per share) | $ / shares $ 12.14 $ 12.54 $ 21.63  
Options        
Outstanding at the beginning of the period (in shares) | shares 6,761      
Granted (in shares) | shares 1,995      
Granted in acquisition (in shares) | shares 11,152      
Exercised (in shares) | shares (4,129)      
Lapsed (in shares) | shares (88)      
Outstanding at the end of the period (in shares) | shares 15,691 6,761    
Exercisable at the end of the period (in shares) | shares 12,440      
Weighted- average exercise price        
Outstanding at the beginning of the period (in dollars per share) | $ / shares $ 60.39      
Granted (in dollars per share) | $ / shares 93.50      
Granted in acquisition (in dollars per share) | $ / shares 70.48      
Exercised (in dollars per share) | $ / shares 51.29      
Lapsed (in dollars per share) | $ / shares 107.33      
Outstanding at the end of the period (in dollars per share) | $ / shares 73.90 $ 60.39    
Exercisable at the end of the period (in dollars per share) | $ / shares $ 69.99      
Weighted-average remaining life (in years)        
Outstanding 4 years 8 months 12 days 5 years 10 months 24 days    
Exercisable 3 years 7 months 6 days      
Aggregate intrinsic value        
Outstanding | $ $ 559 $ 207    
Exercisable | $ 498      
Aggregate intrinsic value of options exercised | $ 186 $ 22 $ 215  
Total fair value of options vested | $ 292      
Unrecognized compensation cost | $ $ 13      
Period for recognition of unrecognized compensation cost 2 years