v3.20.4
Share-Based Payments - Schedule of Share-based Payment Arrangement Activity (Detail) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Weighted Avg. Intrinsic Value per share      
Vested and expected to vest, end of period, shares [1] 75,226    
Total Shareholder Return Units (TSRUs) [Member]      
Number of Shares      
Nonvested, beginning of period, shares 122,654    
Granted, shares [2] 51,158    
Vested, shares [2] (45,757)    
Forfeited, shares [2] (4,782)    
Spin-off adjustment, shares [3] 6,571    
Nonvested, end of period, shares 129,844 122,654  
Weighted Avg. GDFV per share      
Nonvested, beginning of period, weighted-average grant date fair value per share (in dollars per share) $ 7.53    
Granted, weighted-average grant-date fair value per share (in dollars per share) [4] 6.22 [2] $ 8.52 $ 7.42
Vested, weighted-average grant-date fair value per share (in dollars per share) [2] 6.40    
Forfeited, weighted-average grant date fair value per share (in dollars per share) [2] 7.27    
Spin-off adjustment, weighted-average grant date fair value per share (in dollars per share) [3] 6.88    
Nonvested, end of period, weighted-average grant date fair value per share (in dollars per share) 6.90 7.53  
Grant Price      
Nonvested, beginning of period, grant price (in dollars per share) 38.01    
Granted, grant price (in dollars per share) [2] 34.12    
Vested, grant price (in dollars per share) [2] 34.11    
Forfeited, grant price (in dollars per share) [2] 37.20    
Spin-off adjustment, grant price (in dollars per share) [3] 32.94    
Nonvested, end of period, grant price (in dollars per share) $ 32.94 $ 38.01  
Restricted Stock Units [Member]      
Number of Shares      
Nonvested, beginning of period, shares 23,407    
Granted, shares [2] 8,423    
Vested, shares [2] (9,321)    
Reinvested dividend equivalents, shares [2] 955    
Forfeited, shares [2] (999)    
Spin-off adjustment, shares [3] 1,228    
Nonvested, end of period, shares 23,692 23,407  
Weighted Avg. GDFV per share      
Nonvested, beginning of period, weighted-average grant date fair value per share (in dollars per share) $ 37.54    
Granted, weighted-average grant-date fair value per share (in dollars per share) [2] 34.22    
Vested, weighted-average grant-date fair value per share (in dollars per share) [2] 34.70    
Reinvested dividend equivalents, weighted-average grant date fair value per share (in dollars per share) [2] 37.32    
Forfeited, weighted-average grant date fair value per share (in dollars per share) [2] 37.91    
Spin-off adjustment, weighted-average grant date fair value per share (in dollars per share) [3] 35.55    
Nonvested, end of period, weighted-average grant date fair value per share (in dollars per share) $ 35.50 $ 37.54  
Portfolio Performance Shares [Member]      
Number of Shares      
Nonvested, beginning of period, shares [5] 17,694    
Granted, shares [2],[5] 8,150    
Vested, shares [2],[5] (6,393)    
Forfeited, shares [2],[5] (713)    
Spin-off adjustment, shares [3],[5] 1,338    
Nonvested, end of period, shares [5] 20,077 17,694  
Weighted Avg. Intrinsic Value per share      
Nonvested, beginning of period, weighted-average intrinsic value per share (in dollars per share) [5] $ 39.18    
Granted, weighted-average intrinsic value per share (in dollars per share) [2],[5] 34.10    
Vested, weighted-average intrinsic value per share (in dollars per share) [2],[5] 34.73    
Forfeited, weighted-average intrinsic value per share (in dollars per share) [2],[5] 36.78    
Spin-off adjustment, weighted-average intrinsic value per share (in dollars per share) [3],[5] 36.69    
Nonvested, end of period, weighted-average intrinsic value per share (in dollars per share) [5] $ 36.81 $ 39.18  
Vested and expected to vest, end of period, shares 33,900    
Performance Share Awards [Member]      
Number of Shares      
Nonvested, beginning of period, shares 5,061    
Granted, shares [2] 1,713    
Vested, shares [2] (728)    
Forfeited, shares [2] (1,052)    
Spin-off adjustment, shares [3] 270    
Nonvested, end of period, shares 5,264 5,061  
Weighted Avg. Intrinsic Value per share      
Nonvested, beginning of period, weighted-average intrinsic value per share (in dollars per share) $ 39.18    
Granted, weighted-average intrinsic value per share (in dollars per share) [2] 34.10    
Vested, weighted-average intrinsic value per share (in dollars per share) [2] 34.65    
Forfeited, weighted-average intrinsic value per share (in dollars per share) [2] 35.00    
Spin-off adjustment, weighted-average intrinsic value per share (in dollars per share) [3] 36.69    
Nonvested, end of period, weighted-average intrinsic value per share (in dollars per share) $ 36.81 $ 39.18  
[1] The number of options expected to vest takes into account an estimate of expected forfeitures.
[2] Activity prior to the Upjohn Business spin-off has not been adjusted.
[3] In connection with the Upjohn Business spin-off, the Company made adjustments to preserve the intrinsic value of the awards immediately before and after the spin-off. The terms of the outstanding awards remain the same and continue to vest over the original vesting periods. Certain outstanding awards at the time of the spin-off held by employees of Upjohn were prorated for services performed and the remaining portion forfeited at the time of the separation. The share-based awards held as of November 16, 2020 were adjusted as follows:
•The number of outstanding TSRUs was increased and the grant price was decreased.
•The number of shares of common stock subject to each outstanding RSUs, PPSs, and PSAs was increased.
The adjustments to the stock-based compensation awards did not result in additional compensation cost.
[4] Weighted-average GDFV per TSRUs and stock options.
[5] Vested and non-vested shares outstanding, but not paid as of December 31, 2020 were 33.9 million.