Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Basic And Diluted [Abstract]
Net income available for common shareholders (A)	$ 16,728	$ 15,457	$ 55,998	$ 44,813
Weighted average outstanding shares of common stock (B)	7,493	7,539	7,504	7,554
Dilutive effect of stock-based awards	41	58	48	63
Common stock and common stock equivalents (C)	7,534	7,597	7,552	7,617
Earnings Per Share
Basic (A/B)	$ 2.23	$ 2.05	$ 7.46	$ 5.93
Diluted (A/C)	$ 2.22	$ 2.03	$ 7.41	$ 5.88