Revenue Classified by Major Geographic Areas (Detail) (USD $) In Millions	3 Months Ended										12 Months Ended
	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009		Sep. 30, 2009		Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2009
Segment Reporting, Revenue Reconciling Item [Line Items]
United States											$ 38,008	[1]	$ 36,173	[1]	$ 33,052	[1]
Other countries											31,935		26,311		25,385
Total	$ 17,367	$ 16,428	$ 19,953	$ 16,195	$ 16,039	$ 14,503	$ 19,022	[2]	$ 12,920	[3]	$ 69,943		$ 62,484		$ 58,437

[1] Includes shipments to customers in the U.S. and licensing to certain OEMs and multinational organizations.

[2] Reflects $1.7 billion of revenue recognized for sales of Windows Vista with a guarantee to be upgraded to Windows 7 at minimal or no cost and of Windows 7 to original equipment manufacturers and retailers before general availability (the "Windows 7 Deferral").

[3] Reflects $1.5 billion of revenue deferred to future periods relating to the Windows 7 Deferral.