| Document and Entity Information | Oct. 14, 2021 |
| Cover [Abstract] | |
| Entity Address, State or Province | MA |
| Amendment Flag | false |
| Entity Central Index Key | 0001160951 |
| Document Type | 8-K |
| Document Period End Date | Oct. 14, 2021 |
| Entity Registrant Name | Duck Creek Technologies, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 333-240050 |
| Entity Tax Identification Number | 84-3723837 |
| Entity Address, Address Line One | 22 Boston Wharf Rd. |
| Entity Address, Address Line Two | Floor 10 |
| Entity Address, City or Town | Boston |
| Entity Address, Postal Zip Code | 02210 |
| City Area Code | (949) |
| Local Phone Number | 214-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.01 par value |
| Trading Symbol | DCT |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
