Revenue Classified by Significant Product and Service Offerings (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Revenue	$ 28,918	$ 25,826	$ 53,456	$ 47,754
Office Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	7,075	6,439	13,651	12,421
Server Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	6,299	5,332	11,796	10,022
Windows
Revenue from External Customer [Line Items]
Revenue	4,839	4,805	9,482	9,448
Gaming
Revenue from External Customer [Line Items]
Revenue	3,920	3,617	5,816	5,503
Search Advertising
Revenue from External Customer [Line Items]
Revenue	1,820	1,605	3,459	3,034
Enterprise Services
Revenue from External Customer [Line Items]
Revenue	1,435	1,371	2,806	2,726
Devices
Revenue from External Customer [Line Items]
Revenue	1,478	1,697	2,632	3,059
LinkedIn
Revenue from External Customer [Line Items]
Revenue	1,312	228	2,460	228
Other products and services
Revenue from External Customer [Line Items]
Revenue	$ 740	$ 732	$ 1,354	$ 1,313