Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Earning Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 22,291	$ 17,556
Weighted average outstanding shares of common stock (B)	7,429	7,457
Dilutive effect of stock-based awards	33	28
Common stock and common stock equivalents (C)	7,462	7,485
Earnings Per Share
Basic (A/B)	$ 3.00	$ 2.35
Diluted (A/C)	$ 2.99	$ 2.35