| Cover | Dec. 16, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 16, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 1-14287 |
| Entity Registrant Name | Centrus Energy Corp. |
| Entity Central Index Key | 0001065059 |
| Entity Tax Identification Number | 52-2107911 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 6901 Rockledge Drive |
| Entity Address, Address Line Two | Suite 800 |
| Entity Address, City or Town | Bethesda |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 20817 |
| City Area Code | 301 |
| Local Phone Number | 564-3200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.10 per share |
| Trading Symbol | LEU |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
