Segment Revenue (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]
Revenue	$ 28,918	$ 25,826	$ 53,456	$ 47,754
Productivity and Business Processes
Segment Reporting Information [Line Items]
Revenue	8,953	7,179	17,191	13,615
Intelligent Cloud
Segment Reporting Information [Line Items]
Revenue	7,795	6,758	14,717	12,855
More Personal Computing
Segment Reporting Information [Line Items]
Revenue	$ 12,170	$ 11,889	$ 21,548	$ 21,284