Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Significant Accounting Policies [Line Items]
Advertising expense	$ 1,600	$ 1,900	$ 2,300
Net cash from operations	33,325	29,668	32,502
Net cash used in financing	(8,393)	(9,668)	(8,665)
Provision (benefit) for income taxes	$ 2,953	$ 6,314	$ 5,746
Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets	1 year	1 year	1 year
Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives of intangible assets	15 years	15 years	15 years
Adjustments for New Accounting Pronouncement
Significant Accounting Policies [Line Items]
Net cash from operations		$ 588	$ 271
Net cash used in financing		$ (588)	$ (271)
Provision (benefit) for income taxes	$ 402
Software | Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years	3 years	3 years
Software | Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	7 years	7 years	7 years
Computer Equipment | Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	2 years	2 years	2 years
Computer Equipment | Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years	3 years	3 years
Buildings and Improvements | Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years	5 years	5 years
Buildings and Improvements | Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	15 years	15 years	15 years
Leasehold Improvements | Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years	3 years	3 years
Leasehold Improvements | Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	20 years	20 years	20 years
Furniture and Fixtures | Lower Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	1 year	1 year	1 year
Furniture and Fixtures | Upper Limit
Significant Accounting Policies [Line Items]
Estimated useful lives	10 years	10 years	10 years
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