Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Earning Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 72,738	$ 61,271	$ 44,281
Weighted average outstanding shares of common stock (B)	7,496	7,547	7,610
Dilutive effect of stock-based awards	44	61	73
Common stock and common stock equivalents (C)	7,540	7,608	7,683
Earnings Per Share
Basic (A/B)	$ 9.70	$ 8.12	$ 5.82
Diluted (A/C)	$ 9.65	$ 8.05	$ 5.76