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Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Earning Per Share Basic And Diluted [Abstract]    
Net income available for common shareholders (A) $ 17,556 $ 20,505
Weighted average outstanding shares of common stock (B) 7,457 7,513
Dilutive effect of stock-based awards 28 54
Common stock and common stock equivalents (C) 7,485 7,567
Earnings Per Share    
Basic (A/B) $ 2.35 $ 2.73
Diluted (A/C) $ 2.35 $ 2.71