Revenue Classified by Significant Product and Service Offerings (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Revenue from External Customer [Line Items]
Revenue	$ 32,471	$ 28,918	$ 61,555	$ 53,456
Office Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	7,747	7,075	15,369	13,651
Server Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	7,791	6,299	14,849	11,796
Windows
Revenue from External Customer [Line Items]
Revenue	4,758	4,839	9,659	9,482
Gaming
Revenue from External Customer [Line Items]
Revenue	4,232	3,920	6,970	5,816
Search Advertising
Revenue from External Customer [Line Items]
Revenue	1,976	1,820	3,764	3,459
LinkedIn
Revenue from External Customer [Line Items]
Revenue	1,693	1,312	3,223	2,460
Devices
Revenue from External Customer [Line Items]
Revenue	1,948	1,478	3,209	2,632
Enterprise Services
Revenue from External Customer [Line Items]
Revenue	1,521	1,435	2,971	2,806
Other
Revenue from External Customer [Line Items]
Revenue	$ 805	$ 740	$ 1,541	$ 1,354