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Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Earning Per Share Basic And Diluted [Abstract]      
Net income available for common shareholders (A) $ 72,361 $ 72,738 $ 61,271
Weighted average outstanding shares of common stock (B) 7,446 7,496 7,547
Dilutive effect of stock-based awards 26 44 61
Common stock and common stock equivalents (C) 7,472 7,540 7,608
Earnings Per Share      
Basic (A/B) $ 9.72 $ 9.70 $ 8.12
Diluted (A/C) $ 9.68 $ 9.65 $ 8.05