Revenue Classified by Significant Product and Service Offerings (Detail) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	[1]	Mar. 31, 2017	[1]	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2016
Revenue from External Customer [Line Items]
Revenue	$ 30,085	$ 26,819	$ 28,918	$ 24,538	$ 25,605		$ 23,212		$ 25,826		$ 21,928		$ 110,360	$ 96,571	[1]	$ 91,154
Office Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue													28,316	25,573		23,868
Server Products and Cloud Services
Revenue from External Customer [Line Items]
Revenue													26,129	21,649		19,062
Windows
Revenue from External Customer [Line Items]
Revenue													19,518	18,593		17,548
Gaming
Revenue from External Customer [Line Items]
Revenue													10,353	9,051		9,202
Search Advertising
Revenue from External Customer [Line Items]
Revenue													7,012	6,219		5,428
Enterprise Services
Revenue from External Customer [Line Items]
Revenue													5,846	5,542		5,659
Devices
Revenue from External Customer [Line Items]
Revenue													5,134	5,062		7,888
LinkedIn
Revenue from External Customer [Line Items]
Revenue													5,259	2,271		0
Other products and services
Revenue from External Customer [Line Items]
Revenue													$ 2,793	$ 2,611		$ 2,499

[1] On December 8, 2016, we acquired LinkedIn Corporation. LinkedIn has been included in our consolidated results of operations starting on the acquisition date.