Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income available for common shareholders (A)	$ 4,801	$ 3,756	$ 14,691	$ 13,676
Weighted average outstanding shares of common stock (B)	7,725	7,895	7,756	7,952
Dilutive effect of stock-based awards	88	90	84	89
Common stock and common stock equivalents (C)	7,813	7,985	7,840	8,041
Earnings Per Share
Basic (A/B)	$ 0.62	$ 0.48	$ 1.89	$ 1.72
Diluted (A/C)	$ 0.61	$ 0.47	$ 1.87	$ 1.70