Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Earning Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 24,667	$ 22,291
Weighted average outstanding shares of common stock (B)	7,433	7,429
Dilutive effect of stock-based awards	37	33
Common stock and common stock equivalents (C)	7,470	7,462
Earnings Per Share
Basic (A/B)	$ 3.32	$ 3
Diluted (A/C)	$ 3.3	$ 2.99