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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Cumulative Effect, Period of Adoption, Adjustment [Member]
Number of shares of common stock
Common stock and additional paid-in capital [Member]
Accumulated deficit [Member]
Accumulated deficit [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated other comprehensive loss [Member]
Accumulated other comprehensive loss [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning Balance, Shares at Dec. 31, 2017     722.2          
Beginning Balance at Dec. 31, 2017 $ 25,241 $ 29   $ 30,992 $ (5,072) $ 38 $ (679) $ (9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 8,394       8,394      
Other comprehensive income (loss), net of tax (81)           (81)  
Dividends declared on common stock (3,482)       (3,482)      
Issuance of common stock in connection with the Company’s equity award programs, Shares     1.9          
Issuance of common stock in connection with the Company’s equity award programs 56     56        
Stock-based compensation expense 327     327        
Tax impact related to employee stock-based compensation expense (129)     (129)        
Repurchases of common stock, Shares     (94.5)          
Repurchases of common stock (17,855)       (17,855)      
Ending Balance, Shares at Dec. 31, 2018     629.6          
Ending Balance at Dec. 31, 2018 12,500     31,246 (17,977)   (769)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 7,842       7,842      
Other comprehensive income (loss), net of tax 241           241  
Dividends declared on common stock (3,555)       (3,555)      
Issuance of common stock in connection with the Company’s equity award programs, Shares     2.0          
Issuance of common stock in connection with the Company’s equity award programs 97     97        
Stock-based compensation expense 323     323        
Tax impact related to employee stock-based compensation expense (135)     (135)        
Repurchases of common stock, Shares     (40.2)          
Repurchases of common stock $ (7,640)       (7,640)      
Ending Balance, Shares at Dec. 31, 2019 591.4   591.4          
Ending Balance at Dec. 31, 2019 $ 9,673 $ (2)   31,531 (21,330) $ (2) (528)  
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Net income 7,264       7,264      
Other comprehensive income (loss), net of tax (457)           (457)  
Dividends declared on common stock (3,843)       (3,843)      
Issuance of common stock in connection with the Company’s equity award programs, Shares     2.1          
Issuance of common stock in connection with the Company’s equity award programs 91     91        
Stock-based compensation expense 349     349        
Tax impact related to employee stock-based compensation expense (169)     (169)        
Repurchases of common stock, Shares     (15.2)          
Repurchases of common stock $ (3,497)       (3,497)      
Ending Balance, Shares at Dec. 31, 2020 578.3   578.3          
Ending Balance at Dec. 31, 2020 $ 9,409     $ 31,802 $ (21,408)   $ (985)