Revenue Classified by Significant Product and Service Offerings (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2014
Revenue from External Customer [Line Items]
Revenue	$ 20,614	[1]	$ 20,531	[1]	$ 23,796	[1]	$ 20,379	[1]	$ 22,180	$ 21,729	$ 26,470	$ 23,201	$ 85,320	[1]	$ 93,580	$ 86,833
Commercial Cloud
Revenue from External Customer [Line Items]
Revenue													9,500		$ 5,800	$ 2,800
Windows 10 Licenses
Revenue from External Customer [Line Items]
Revenue	$ 2,000		$ 1,600		$ 1,700		$ 1,300						$ 6,600

[1] Reflects the impact of the net revenue deferral from Windows 10 of $1.3 billion, $1.7 billion, $1.6 billion, and $2.0 billion, for the first, second, third, and fourth quarter of fiscal year 2016, respectively, and $6.6 billion for fiscal year 2016.