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Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Earning Per Share Basic And Diluted [Abstract]        
Net income available for common shareholders (A) $ 16,425 $ 18,765 $ 33,981 $ 39,270
Weighted average outstanding shares of common stock (B) 7,451 7,505 7,454 7,509
Dilutive effect of stock-based awards 22 50 25 52
Common stock and common stock equivalents (C) 7,473 7,555 7,479 7,561
Earnings Per Share        
Basic (A/B) $ 2.20 $ 2.50 $ 4.56 $ 5.23
Diluted (A/C) $ 2.20 $ 2.48 $ 4.54 $ 5.19