| Document and Entity Information | Dec. 06, 2023 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001501825 |
| Document Type | 8-K |
| Document Period End Date | Dec. 06, 2023 |
| Entity Registrant Name | Hartford Funds Exchange-Traded Trust |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 811-23222 |
| Entity Tax Identification Number | 86-3860707 |
| Entity Address, Address Line One | 690 Lee Road |
| Entity Address, City or Town | Wayne |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19087 |
| City Area Code | (610) |
| Local Phone Number | 386-4068 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Hartford Short Duration ETF |
| Trading Symbol | HSRT |
| Security Exchange Name | CboeBZX |
| Entity Emerging Growth Company | false |
