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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   $ (340)  
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   427        
Net income $ 10,678   10,678      
Other comprehensive income (loss) 279       279  
Common stock cash dividends (3,886)   (3,887)      
Common stock repurchased   (1,326) (3,701)      
Stock-based compensation expense   1,262        
Other, net   (1)        
Balance, end of period at Sep. 30, 2019 $ 106,061 78,882 27,240 $ 0 (61) $ 0
Cash dividends declared per common share $ 0.51          
Balance, beginning of period at Jun. 30, 2020 $ 118,304 80,552 34,566   3,186  
Accounting Standards Update [Extensible List] us-gaap:AccountingStandardsUpdate201601Member          
Common stock issued   815        
Net income $ 13,893   13,893      
Other comprehensive income (loss) (86)       (86)  
Common stock cash dividends (4,236)   (4,231)      
Common stock repurchased   (1,732) (5,003)      
Stock-based compensation expense   1,456        
Other, net   (2)        
Balance, end of period at Sep. 30, 2020 $ 123,392 $ 81,089 $ 39,193 $ (32) $ 3,110 $ 10
Cash dividends declared per common share $ 0.56