| Cover | Aug. 13, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 13, 2024 |
| Entity File Number | 001-38322 |
| Entity Registrant Name | FTE NETWORKS, INC. |
| Entity Central Index Key | 0001122063 |
| Entity Tax Identification Number | 81-0438093 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 641 Lexington Avenue |
| Entity Address, Address Line Two | 14th Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10022 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
