Components of Unearned Revenue (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013		Jun. 30, 2012
Deferred Revenue Arrangement [Line Items]
Unearned revenue	$ 17,905		$ 20,059
Volume Licensing Programs
Deferred Revenue Arrangement [Line Items]
Unearned revenue	14,205		16,717
Other
Deferred Revenue Arrangement [Line Items]
Unearned revenue	$ 3,700	[1]	$ 3,342	[1]

[1] Other as of March 31, 2013 includes a net $784 million of unearned revenue associated with sales of the previous version of the Microsoft Office system with a guarantee to be upgraded to the new Office at minimal or no cost (the "Office Upgrade Offer"). Other as of June 30, 2012 includes $540 million of unearned revenue associated with sales of Windows 7 with an option to upgrade to Windows 8 Pro at a discounted price (the "Windows Upgrade Offer").