| Cover Page | Oct. 05, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 5, 2020 |
| Entity Registrant Name | Guidewire Software, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35394 |
| Entity Tax Identification Number | 36-4468504 |
| Entity Address, Address Line One | 2850 S. Delaware St., Suite 400 |
| Entity Address, City or Town | San Mateo |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94403 |
| City Area Code | 650 |
| Local Phone Number | 357-9100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.0001 par value |
| Trading Symbol | GWRE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001528396 |
