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Condensed Consolidated Statement of Stockholders' Equity - USD ($)
$ in Millions
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Capital in excess of par value
Retained earnings
Retained earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)
Cumulative Effect, Period of Adoption, Adjustment
Treasury stock
Balance at beginning of period at Dec. 31, 2019 $ 9,832   $ 808 $ 1,581 $ 17,945   $ (61)   $ (10,441)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Repurchase of common stock (451)               (451)
Issuance of common and treasury stock pursuant to Employee stock plans (2)     (8)         6
Share-based compensation 9     9          
Cash dividends (94)       (94)        
Comprehensive income (loss) (219)       (94)   (125)    
Balance at end of period at Mar. 31, 2020 9,075   808 1,582 17,757   (186)   (10,886)
Balance at beginning of period at Dec. 31, 2019 9,832   808 1,581 17,945   (61)   (10,441)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Comprehensive income (loss) (2,207)                
Balance at end of period at Sep. 30, 2020 9,769   888 4,175 15,685   (102)   (10,877)
Balance at beginning of period at Mar. 31, 2020 9,075   808 1,582 17,757   (186)   (10,886)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common stock, net of issuance costs 2,224   80 2,144          
Issuance of common and treasury stock pursuant to Employee stock plans 13     8         5
Share-based compensation (2)     (2)          
Stock warrants 35     35          
Equity feature of convertible notes, net of issuance costs 392     392          
Comprehensive income (loss) (859)       (915)   56    
Balance at end of period at Jun. 30, 2020 10,878   888 4,159 16,842   (130)   (10,881)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common and treasury stock pursuant to Employee stock plans 13     9         4
Share-based compensation 2     2          
Stock warrants 5     5          
Comprehensive income (loss) (1,129)       (1,157)   28    
Balance at end of period at Sep. 30, 2020 9,769   888 4,175 15,685   (102)   (10,877)
Balance at beginning of period at Dec. 31, 2020 8,876 $ 0 888 4,191 14,777 $ 19 (105) $ (19) (10,875)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common and treasury stock pursuant to Employee stock plans 0     (8)         8
Share-based compensation 14     14          
Stock warrants 23     23          
Comprehensive income (loss) 180       116   64    
Balance at end of period at Mar. 31, 2021 9,093   888 4,220 14,912   (60)   (10,867)
Balance at beginning of period at Dec. 31, 2020 8,876 $ 0 888 4,191 14,777 $ 19 (105) $ (19) (10,875)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Comprehensive income (loss) 1,300                
Balance at end of period at Sep. 30, 2021 10,250   888 4,251 15,706   267   (10,862)
Balance at beginning of period at Mar. 31, 2021 9,093   888 4,220 14,912   (60)   (10,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common and treasury stock pursuant to Employee stock plans 13     11         2
Share-based compensation 16     16          
Stock warrants 22     22          
Comprehensive income (loss) 544       348   196    
Balance at end of period at Jun. 30, 2021 9,688   888 4,269 15,260   136   (10,865)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common and treasury stock pursuant to Employee stock plans 13     10         3
Share-based compensation 14     14          
Equity feature of partial extinguishment of convertible notes (42)     (42)          
Comprehensive income (loss) 577       446   131    
Balance at end of period at Sep. 30, 2021 $ 10,250   $ 888 $ 4,251 $ 15,706   $ 267   $ (10,862)