| Document and Entity Information | Jul. 07, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jul. 7, 2020 |
| Entity Registrant Name | COVIA HOLDINGS CORPORATION |
| Entity Central Index Key | 0001722287 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-38510 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 13-2656671 |
| Entity Address, Address Line One | 3 Summit Park Drive |
| Entity Address, Address Line Two | Suite 700 |
| Entity Address, City or Town | Independence |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 44131 |
| City Area Code | 800 |
| Local Phone Number | 255-7263 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of each class | Common Stock |
| Trading Symbol | CVIA |
| Security Exchange Name | NYSE |
