Operating Income (Loss) by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Operating income (loss)	$ 8,679	$ 7,905	$ 16,387	$ 14,620
Productivity and Business Processes
Segment Reporting Information [Line Items]
Operating income (loss)	3,337	3,053	6,343	5,958
Intelligent Cloud
Segment Reporting Information [Line Items]
Operating income (loss)	2,832	2,291	4,969	4,068
More Personal Computing
Segment Reporting Information [Line Items]
Operating income (loss)	$ 2,510	$ 2,561	$ 5,075	$ 4,594