Operating Income (Loss) by Segment (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Operating income (loss)		$ 5,594	$ 5,283	$ 16,996	$ 17,102
Reportable Segments | Productivity and Business Processes
Segment Reporting Information [Line Items]
Operating income (loss)		2,783	2,981	9,159	9,429
Reportable Segments | Intelligent Cloud
Segment Reporting Information [Line Items]
Operating income (loss)		2,181	2,176	6,637	7,135
Reportable Segments | More Personal Computing
Segment Reporting Information [Line Items]
Operating income (loss)		2,097	1,751	6,524	5,154
Corporate and Other
Segment Reporting Information [Line Items]
Operating income (loss)	[1]	$ (1,467)	$ (1,625)	$ (5,324)	$ (4,616)

[1] Consists of the net revenue deferral from Windows 10.