| Document and Entity Information | Feb. 25, 2021 |
| Document and Entity Information [Abstract] | |
| Entity Registrant Name | TERMINIX GLOBAL HOLDINGS, INC. |
| Entity Central Index Key | 0001428875 |
| Document Type | 8-K |
| Document Period End Date | Feb. 25, 2021 |
| Amendment Flag | false |
| Entity Incorporation, State or Country Code | DE |
| Entity Emerging Growth Company | false |
| Security 12b Title | Common, par value $0.01 |
| Security Exchange Name | NYSE |
| Trading Symbol | TMX |
| Entity File Number | 001-36507 |
| Entity Address, Address Line One | 150 Peabody Place |
| Entity Address, City or Town | Memphis |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 38103 |
| Entity Tax Identification Number | 20-8738320 |
| City Area Code | (901) |
| Local Phone Number | 597-1400 |
| WrittenCommunications | false |
| SolicitingMaterial | false |
| PreCommencementTenderOffer | false |
| PreCommencementIssuerTenderOffer | false |
