Document and Entity Information |
Feb. 29, 2020 |
|---|---|
| Cover [Abstract] | |
| Amendment Flag | true |
| Entity Central Index Key | 0001708035 |
| Document Type | 8-K/A |
| Document Period End Date | Feb. 29, 2020 |
| Entity Registrant Name | PQ Group Holdings Inc. |
| Entity File Number | 001-38221 |
| Entity Incorporation State Country Code | DE |
| Entity Tax Identification Number | 81-3406833 |
| Entity Address, Address Line One | 300 Lindenwood Drive |
| Entity Address, City or Town | Malvern |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | 610 |
| Local Phone Number | 651-4400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | PQG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | This Current Report on Form 8-K/A is being filed as an amendment (this “Amendment No. 1”) to the Current Report on Form 8-K filed by PQ Group Holdings Inc. (the “Company”) with the Securities and Exchange Commission on March 5, 2020 (the “Original Report”). This Amendment No. 1 is being filed to update the effective date of Kimberly Ross’s resignation from the Company’s Board of Directors. Except as set forth herein, this Amendment No. 1 does not amend, modify or update the disclosure contained in the Original Report. |