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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
Comprehensive income:          
Common stock, dividends, per share, declared (in dollars per share) $ 0.94        
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
Comprehensive income:          
Common stock, dividends, per share, declared (in dollars per share) $ 0.99