| Document and Entity Information | Feb. 24, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 24, 2021 |
| Entity Registrant Name | TRONOX HOLDINGS PLC |
| Entity Incorporation, State or Country Code | X0 |
| Entity File Number | 001-35573 |
| Entity Tax Identification Number | 98-1467236 |
| Entity Address, Address Line One | 263 Tresser Boulevard, Suite 1100 |
| Entity Address, City or Town | Stamford |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06901 |
| City Area Code | 203 |
| Local Phone Number | 705-3800 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001530804 |
| Title of 12(b) Security | Ordinary shares, par value $0.01 per share |
| Trading Symbol | TROX |
| Security Exchange Name | NYSE |
