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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Accum. Other Comprehensive Loss
Retained Income
Balance at Beginning of Year at Dec. 31, 2019 $ 15,184 $ 259 $ 2,209 $ (491) $ 13,207
Comprehensive income:          
Net income 381       381
Other comprehensive income 10     10  
Total comprehensive income 391        
Dividends on common stock, (242)       (242)
Share repurchases (466) (2) (21)   (443)
Stock-based compensation 17 1 17   (1)
Balance at End of Period at Mar. 31, 2020 14,884 258 2,205 (481) 12,902
Balance at Beginning of Year at Dec. 31, 2019 15,184 259 2,209 (491) 13,207
Comprehensive income:          
Net income 773        
Other comprehensive income 16        
Total comprehensive income 789        
Share repurchases (669)        
Balance at End of Period at Jun. 30, 2020 14,861 256 2,217 (475) 12,863
Balance at Beginning of Year at Mar. 31, 2020 14,884 258 2,205 (481) 12,902
Comprehensive income:          
Net income 392       392
Other comprehensive income 6     6  
Total comprehensive income 398        
Dividends on common stock, (240)       (240)
Share repurchases (203) (2) (10)   (191)
Stock-based compensation 22   22  
Balance at End of Period at Jun. 30, 2020 14,861 256 2,217 (475) 12,863
Balance at Beginning of Year at Dec. 31, 2020 14,791 254 2,248 (594) 12,883
Comprehensive income:          
Net income 673       673
Other comprehensive income 8     8  
Total comprehensive income 681        
Dividends on common stock, (249)       (249)
Share repurchases (591) (3) (19)   (569)
Stock-based compensation 11   12   (1)
Balance at End of Period at Mar. 31, 2021 14,643 251 2,241 (586) 12,737
Balance at Beginning of Year at Dec. 31, 2020 14,791 254 2,248 (594) 12,883
Comprehensive income:          
Net income 1,492        
Other comprehensive income 16        
Total comprehensive income 1,508        
Share repurchases (1,500)        
Balance at End of Period at Jun. 30, 2021 14,317 248 2,240 (578) 12,407
Balance at Beginning of Year at Mar. 31, 2021 14,643 251 2,241 (586) 12,737
Comprehensive income:          
Net income 819       819
Other comprehensive income 8     8  
Total comprehensive income 827        
Dividends on common stock, (247)       (247)
Share repurchases (934) (3) (28)   (903)
Stock-based compensation 28   27   1
Balance at End of Period at Jun. 30, 2021 $ 14,317 $ 248 $ 2,240 $ (578) $ 12,407