Cover - USD ($)	12 Months Ended
	Dec. 31, 2020	Apr. 23, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
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
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Trading Symbol	VRT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 3,339,190,951
Entity Common Stock, Shares Outstanding (in shares)		352,205,415
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for use in connection with its 2021 Annual Meeting of Shareholders, which is to be filed no later than 120 days after December 31, 2020, are incorporated by reference into Part III of this Annual Report on Form 10-K.
Entity Central Index Key	0001674101
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2020
Amendment Flag	true
Amendment Description	As a result of recent guidance provided by the SEC on April 12, 2021, for all SPAC-related companies regarding the accounting and reporting for their warrants, it is restating its previously issued 2020 consolidated financial statements. The restatement pertains to the accounting treatment for public and private placement warrants that were outstanding at the time of the merger with GS Acquisitions Holding Corp on February 7, 2020