Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Payments For Early Payment Of Notes, Redemption Premium

+ References

No definition available.

+ Details

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Namespace Prefix:	vrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=vrt_TermLoanDue2027Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrt_ABLRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrt_TermLoanDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=vrt_PriorNotesMember
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Debt - Refinancing (Details) - USD ($)		12 Months Ended
Debt - Refinancing (Details) - USD ($)	Mar. 02, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 22, 2017	Nov. 30, 2016
Debt Instrument [Line Items]
Repayments of of prior ABL revolving credit facility		$ 470,500,000	$ 591,200,000	$ 320,000,000.0
Redemption premium		75,000,000.0	0	0
Term Loan Due 2027
Debt Instrument [Line Items]
Repayment of prior term loan		16,500,000	0	0
Term Loan Due 2027 \| Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount	$ 2,200,000,000.0
ABL Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of of prior ABL revolving credit facility	176,000,000.0
Term Loan Due 2023
Debt Instrument [Line Items]
Repayment of prior term loan		$ 2,070,000,000.0	$ 0	$ 0
Term Loan Due 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate principal amount					$ 325,000,000.0	$ 2,320,000,000.0
Repayment of prior term loan	1,285,900,000
Prior Notes
Debt Instrument [Line Items]
Write off of deferred debt issuance cost	99,000,000.0
Redemption premium	$ 75,000,000.0