Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Significant Accounting Policies [Line Items]
Advertising expense																	$ 1,500		$ 1,600		$ 1,900
Revenue	$ 23,317	[1],[2]	$ 22,090	[1],[2]	$ 24,090	[1],[2]	$ 20,453	[1],[2]	$ 20,614	[3]	$ 20,531	[3]	$ 23,796	[3]	$ 20,379	[3]	89,950	[1],[2]	85,320	[3]	93,580
Provision for income taxes																	1,945		2,953		$ 6,314
Unearned revenue	44,479								33,909								44,479		33,909
Deferred income taxes	531								1,476								531		1,476
Scenario Plan
Significant Accounting Policies [Line Items]
Revenue																	96,571		91,154
Provision for income taxes																	4,412		5,100
Unearned revenue	26,656								22,193								26,656		22,193
Deferred income taxes	5,734								6,313								5,734		6,313
Accounting Standards Update 2016-02 | Scenario Plan
Significant Accounting Policies [Line Items]
Recognition of additional ROU assets for operating leases	6,600								5,200								6,600		5,200
Recognition of additional lease liabilities for operating leases	6,600								5,200								6,600		5,200
Revenue																	0		0
Provision for income taxes																	0		0
Unearned revenue	0								0								0		0
Deferred income taxes	0								0								0		0
Accounting Standards Update 2014-09 | Scenario Plan
Significant Accounting Policies [Line Items]
Revenue																	6,621		5,834
Provision for income taxes																	2,467		2,147
Accounts receivable and other current and long-term assets	2,700								4,200								2,700		4,200
Unearned revenue	(17,823)								(11,716)								(17,823)		(11,716)
Deferred income taxes	5,203								4,837								$ 5,203		4,837
Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets																	1 year
Lower Limit | Software
Significant Accounting Policies [Line Items]
Estimated useful lives																	3 years
Lower Limit | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives																	2 years
Lower Limit | Buildings and Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives																	5 years
Lower Limit | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives																	3 years
Lower Limit | Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives																	1 year
Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets																	15 years
Upper Limit | Software
Significant Accounting Policies [Line Items]
Estimated useful lives																	7 years
Upper Limit | Computer Equipment
Significant Accounting Policies [Line Items]
Estimated useful lives																	3 years
Upper Limit | Buildings and Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives																	15 years
Upper Limit | Leasehold Improvements
Significant Accounting Policies [Line Items]
Estimated useful lives																	20 years
Upper Limit | Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives																	10 years
Windows 10 Licenses
Significant Accounting Policies [Line Items]
Revenue	$ 1,400		$ 1,500		$ 2,000		$ 1,900		$ 2,000		$ 1,600		$ 1,700		$ 1,300		$ 6,700		$ 6,600
Windows 10 Licenses | Lower Limit
Significant Accounting Policies [Line Items]
Revenue recognition period																	2 years
Windows 10 Licenses | Upper Limit
Significant Accounting Policies [Line Items]
Revenue recognition period																	4 years

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

[2] Reflects the impact of the net revenue deferral from Windows 10 of $1.9 billion, $2.0 billion, $1.5 billion, and $1.4 billion, for the first, second, third, and fourth quarter of fiscal year 2017, respectively, and $6.7 billion for fiscal year 2017.

[3] Reflects the impact of the net revenue deferral from Windows 10 of $1.3 billion, $1.7 billion, $1.6 billion, and $2.0 billion, for the first, second, third, and fourth quarter of fiscal year 2016, respectively, and $6.6 billion for fiscal year 2016.