| Document and Entity Information | Aug. 02, 2020 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | MICROSOFT CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0000789019 |
| Document Type | 8-K |
| Document Period End Date | Aug. 2, 2020 |
| Entity Incorporation State Country Code | WA |
| Entity File Number | 001-37845 |
| Entity Tax Identification Number | 91-1144442 |
| Entity Address, Address Line One | One Microsoft Way |
| Entity Address, City or Town | Redmond |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 98052-6399 |
| City Area Code | 425 |
| Local Phone Number | 882-8080 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common stock, $0.00000625 par value per share |
| Trading Symbol | MSFT |
| Security Exchange Name | NASDAQ |
| Notes Two Point One Two Five Percent Due December Six Twenty Twenty One [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2.125% Notes due 2021 |
| Trading Symbol | MSFT |
| Security Exchange Name | NASDAQ |
| Notes Three Point One Two Five Percent Due December Six Twenty Twenty Eight [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 3.125% Notes due 2028 |
| Trading Symbol | MSFT |
| Security Exchange Name | NASDAQ |
| Notes Two Point Six Two Five Percent Due May Two Twenty Thirty Three [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 2.625% Notes due 2033 |
| Trading Symbol | MSFT |
| Security Exchange Name | NASDAQ |
