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Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Common Stock Held in Treasury
Accumulated Other Comprehensive Income (Loss)
Non-controlling Interest
Beginning balance at Dec. 31, 2019 $ 3,030 $ 6 $ 1,304 $ 22,403 $ (18,982) $ (1,705) $ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 885     885      
Common stock issued for stock-based compensation 16   (3)   19    
Stock-based compensation expense 17   17        
Repurchases of common stock (706)       (706)    
Dividends declared (676)     (676)      
Other comprehensive income (loss) (204)         (204)  
Noncontrolling interest (4)   (1)       (3)
Ending balance at Jun. 30, 2020 2,358 6 1,317 22,612 (19,669) (1,909) 1
Beginning balance at Mar. 31, 2020 2,284 6 1,309 22,631 (19,680) (1,983) 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 319     319      
Common stock issued for stock-based compensation 11       11    
Stock-based compensation expense 8   8        
Dividends declared (338)     (338)      
Other comprehensive income (loss) 74         74  
Ending balance at Jun. 30, 2020 2,358 6 1,317 22,612 (19,669) (1,909) 1
Beginning balance at Dec. 31, 2020 3,182 6 1,362 23,114 (19,659) (1,642) 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 1,446     1,446      
Common stock issued for stock-based compensation 32   13   19    
Stock-based compensation expense 27   27        
Repurchases of common stock (500)       (500)    
Dividends declared (718)     (718)      
Other comprehensive income (loss) 52         52  
Noncontrolling interest 0            
Ending balance at Jun. 30, 2021 3,521 6 1,402 23,842 (20,140) (1,590) 1
Beginning balance at Mar. 31, 2021 3,276 6 1,378 23,425 (19,897) (1,638) 2
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 775     775      
Common stock issued for stock-based compensation 15   8   7    
Stock-based compensation expense 16   16        
Repurchases of common stock (250)       (250)    
Dividends declared (358)     (358)      
Other comprehensive income (loss) 48         48  
Noncontrolling interest (1)           (1)
Ending balance at Jun. 30, 2021 $ 3,521 $ 6 $ 1,402 $ 23,842 $ (20,140) $ (1,590) $ 1