| Component: (Network and Table) | |
|---|---|
| Network | 1060 - Disclosure - Investments - Additional Information (Detail) (http://www.microsoft.com/taxonomy/role/DisclosureInvestmentsAdditionalInformation) |
| Table | Schedule of Cost-method Investments [Table] |
| Reporting Entity [Axis] | 0000789019 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Schedule of Cost-method Investments [Line Items] | Period [Axis] | |
|---|---|---|
2013-06-30 | 2012-06-30 | |
Recorded basis of common and preferred stock and other investments that are restricted for more than one year or are not publicly traded | 395,000,000 | 313,000,000 |