| Component: (Network and Table) | |
|---|---|
| Network | 1053 - Disclosure - Accounting Policies - Additional Information (Detail) (http://www.microsoft.com/taxonomy/role/DisclosureAccountingPoliciesAdditionalInformation) |
| Table | Significant Accounting Policies [Table] |
| Reporting Entity [Axis] | 0000789019 (http://www.sec.gov/CIK) |
| Legal Entity [Axis] | Entity [Domain] |
| Significant Accounting Policies [Line Items] | Period [Axis] | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2012-07-01 - 2013-06-30 | 2011-07-01 - 2012-06-30 | 2010-07-01 - 2011-06-30 | ||||||||||||||||||||||||||||||||
| Property Plant And Equipment By Type [Axis] | Property Plant And Equipment By Type [Axis] | Property Plant And Equipment By Type [Axis] | ||||||||||||||||||||||||||||||||
| Computer Software [Member] | Computer Equipment [Member] | Building And Building Improvements [Member] | Leasehold Improvements [Member] | Furniture And Fixtures [Member] | Property Plant And Equipment Type [Domain] | Computer Equipment [Member] | Building And Building Improvements [Member] | Leasehold Improvements [Member] | Furniture And Fixtures [Member] | Property Plant And Equipment Type [Domain] | Computer Equipment [Member] | Building And Building Improvements [Member] | Leasehold Improvements [Member] | Furniture And Fixtures [Member] | Property Plant And Equipment Type [Domain] | |||||||||||||||||||
| Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | |||||||||||||||||||
| Range [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Range [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Range [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Range [Member] | |
Advertising expense | 2,600,000,000 | 1,600,000,000 | 1,900,000,000 | |||||||||||||||||||||||||||||||
Share-based compensation cost recognition/vesting/service period | P4Y | P5Y | P4Y | P5Y | P4Y | P5Y | ||||||||||||||||||||||||||||
Percentage of market value at which employees are able to purchase shares of common stock | .90 | |||||||||||||||||||||||||||||||||
Estimated useful lives | P3Y | P2Y | P3Y | P5Y | P15Y | P2Y | P10Y | P1Y | P5Y | P2Y | P3Y | P5Y | P15Y | P2Y | P10Y | P1Y | P5Y | P2Y | P3Y | P5Y | P15Y | P2Y | P10Y | P1Y | P5Y | |||||||||
Estimated useful lives of intangible assets | P1Y | P15Y | P1Y | P15Y | P1Y | P15Y | ||||||||||||||||||||||||||||