| Cover | Oct. 28, 2020 | Oct. 01, 2020 |
| Document Information [Line Items] | ||
| Document Type | 8-K | |
| Document Period End Date | Oct. 28, 2020 | |
| Entity Registrant Name | VERTIV HOLDINGS CO | |
| Entity Incorporation, State or 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 | |
| Entity Emerging Growth Company | true | |
| Entity Central Index Key | 0001674101 | |
| Amendment Flag | false | |
| Entity Ex Transition Period | false | |
| Class A common stock, $0.0001 par value per share [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Class A common stock, $0.0001 par value per share | |
| Trading Symbol | VRT | |
| Security Exchange Name | NYSE | |
| Units, each consisting of one share of Class A common stock, $0.0001 par value per share, and one-third of one redeemable warrant to purchase one share of Class A common stock [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Units, each consisting of one share of Class A common stock, $0.0001 par value per share, and | |
| Trading Symbol | VERT.U | |
| Security Exchange Name | NYSE | |
| Redeemable warrants to purchase Class A common stock [Member] | ||
| Document Information [Line Items] | ||
| Title of 12(b) Security | Redeemable warrants to purchase Class A common stock | |
| Trading Symbol | VRT WS | |
| Security Exchange Name | NYSE |
