Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income available for common shareholders (A)	$ 4,998	$ 5,863	$ 9,618	$ 10,403
Weighted average outstanding shares of common stock (B)	7,964	8,228	7,980	8,238
Dilutive effect of stock-based awards	64	69	67	83
Common stock and common stock equivalents (C)	8,028	8,297	8,047	8,321
Earnings Per Share
Basic (A/B)	$ 0.63	$ 0.71	$ 1.21	$ 1.26
Diluted (A/C)	$ 0.62	$ 0.71	$ 1.20	$ 1.25