Revenue Classified by Major Geographic Areas (Detail) - USD ($) $ in Millions		3 Months Ended												12 Months Ended
		Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2016		Jun. 30, 2015	Jun. 30, 2014
Geographic Information [Line Items]
Revenues		$ 20,614		$ 20,531		$ 23,796		$ 20,379		$ 22,180	$ 21,729	$ 26,470	$ 23,201	$ 85,320	[1]	$ 93,580	$ 86,833
United States
Geographic Information [Line Items]
Revenues	[2]													40,578		42,941	43,474
Other Countries
Geographic Information [Line Items]
Revenues														$ 44,742		$ 50,639	$ 43,359

[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.

[2] Includes billings to OEMs and certain multinational organizations because of the nature of these businesses and the impracticability of determining the geographic source of the revenue.