Cover - shares	9 Months Ended
	Sep. 30, 2020	Nov. 04, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	001-38518
Entity Registrant Name	Vertiv Holdings Co
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-2376902
Entity Address, Address Line One	1050 Dearborn Dr
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		328,412,705
Entity Central Index Key	0001674101
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Class A common stock, $0.0001 par value per share
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
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 one-third of one
Trading Symbol	VERT. U
Security Exchange Name	NYSE
Redeemable warrants to purchase Class A common stock
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