Segment Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenue	$ 26,819	$ 23,212	$ 80,275	$ 70,966
Productivity and Business Processes
Segment Reporting Information [Line Items]
Revenue	9,006	7,707	26,197	21,322
Intelligent Cloud
Segment Reporting Information [Line Items]
Revenue	7,896	6,730	22,613	19,585
More Personal Computing
Segment Reporting Information [Line Items]
Revenue	$ 9,917	$ 8,775	$ 31,465	$ 30,059