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STOCKHOLDERS' EQUITY STATEMENTS - USD ($)
$ in Millions
Total
Common stock and paid-in capital
Retained earnings
Retained earnings
Cumulative effect of accounting changes
Accumulated other comprehensive income (loss)
Accumulated other comprehensive income (loss)
Cumulative effect of accounting changes
Balance, beginning of period at Jun. 30, 2019   $ 78,520 $ 24,150 $ 0 $ (340) $ 0
Common stock cash dividends $ (3,886)          
Balance, end of period at Sep. 30, 2019   78,882 27,240 0 (61) 0
Cash dividends declared per common share $ 0.51          
Balance, beginning of period at Jun. 30, 2019   78,520 24,150 0 (340) 0
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   661        
Net income $ 22,327   22,327      
Other comprehensive income (loss) 85       85  
Common stock cash dividends (7,762)   (7,762)      
Common stock repurchased   (2,157) (7,976)      
Stock-based compensation expense   2,602        
Other, net   (1)        
Balance, end of period at Dec. 31, 2019 $ 110,109 79,625 30,739   (255)  
Cash dividends declared per common share $ 1.02          
Balance, beginning of period at Sep. 30, 2019   78,882 27,240 0 (61) 0
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   234        
Net income $ 11,649   11,649      
Other comprehensive income (loss) (194)       (194)  
Common stock cash dividends (3,876)   (3,875)      
Common stock repurchased   (831) (4,275)      
Stock-based compensation expense   1,340        
Other, net   0        
Balance, end of period at Dec. 31, 2019 $ 110,109 79,625 30,739   (255)  
Cash dividends declared per common share $ 0.51          
Balance, beginning of period at Jun. 30, 2020 $ 118,304 80,552 34,566 (32) 3,186 10
Common stock cash dividends $ (4,230)          
Balance, end of period at Sep. 30, 2020   81,089 39,193 0 3,110 0
Cash dividends declared per common share $ 0.56          
Balance, beginning of period at Jun. 30, 2020 $ 118,304 80,552 34,566 (32) 3,186 10
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   1,117        
Net income $ 29,356   29,356      
Other comprehensive income (loss) 171       171  
Common stock cash dividends (8,456)   (8,451)      
Common stock repurchased   (2,794) (10,466)      
Stock-based compensation expense   3,022        
Other, net   (1)        
Balance, end of period at Dec. 31, 2020 $ 130,236 81,896 44,973   3,367  
Cash dividends declared per common share $ 1.12          
Balance, beginning of period at Sep. 30, 2020   81,089 39,193 $ 0 3,110 $ 0
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   302        
Net income $ 15,463   15,463      
Other comprehensive income (loss) 257       257  
Common stock cash dividends (4,226)   (4,220)      
Common stock repurchased   (1,062) (5,463)      
Stock-based compensation expense   1,566        
Other, net   1        
Balance, end of period at Dec. 31, 2020 $ 130,236 $ 81,896 $ 44,973   $ 3,367  
Cash dividends declared per common share $ 0.56