| Document and Entity Information | Oct. 03, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001674101 |
| Document Type | 8-K |
| Document Period End Date | Oct. 03, 2022 |
| Entity Registrant Name | VERTIV HOLDINGS CO |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38518 |
| Entity Tax Identification Number | 81-2376902 |
| Entity Address, Address Line One | 1050 Dearborn Drive |
| Entity Address, City or Town | Columbus |
| Entity Address, State or Province | OH |
| Entity Address, Postal Zip Code | 43085 |
| City Area Code | 614 |
| Local Phone Number | 888-0246 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A common stock, $0.0001 par value per share |
| Trading Symbol | VRT |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
