Revenue Classified by Significant Product and Service Offerings (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Revenue	$ 26,819	$ 23,212	$ 80,275	$ 70,966
Office Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	7,088	6,234	20,739	18,655
Server Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue	6,343	5,297	18,139	15,319
Windows
Revenue from External Customer [Line Items]
Revenue	4,612	4,253	14,094	13,701
Gaming
Revenue from External Customer [Line Items]
Revenue	2,251	1,906	8,067	7,409
Search Advertising
Revenue from External Customer [Line Items]
Revenue	1,784	1,599	5,243	4,633
Enterprise Services
Revenue from External Customer [Line Items]
Revenue	1,489	1,383	4,295	4,109
Devices
Revenue from External Customer [Line Items]
Revenue	1,219	958	3,851	4,017
LinkedIn
Revenue from External Customer [Line Items]
Revenue	1,335	976	3,795	1,204
Other products and services
Revenue from External Customer [Line Items]
Revenue	$ 698	$ 606	$ 2,052	$ 1,919