Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Earning Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 18,299	$ 16,728	$ 52,280	$ 55,998
Weighted average outstanding shares of common stock (B)	7,441	7,493	7,450	7,504
Dilutive effect of stock-based awards	23	41	24	48
Common stock and common stock equivalents (C)	7,464	7,534	7,474	7,552
Earnings Per Share
Basic (A/B)	$ 2.46	$ 2.23	$ 7.02	$ 7.46
Diluted (A/C)	$ 2.45	$ 2.22	$ 6.99	$ 7.41