Number of shares of equity interests issued or issuable to acquire entity.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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- Definition

Cash received on stock transaction after deduction of issuance costs.

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The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

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Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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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.

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Payment To Vertiv Stockholder

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Sale Of Stock, Consideration Received On Transaction Before Issuance Costs

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Summary of Significant Accounting Policies - Description of Business Narrative (Details) $ / shares in Units, $ in Millions				12 Months Ended
	Aug. 17, 2020 shares	Feb. 07, 2020 USD ($) $ / shares shares	Jun. 12, 2018 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of operating segments \| segment				3
Number of reportable segments \| segment				3
Payment to Vertiv stockholder \| $		$ 341.6		$ 341.6	$ 0.0	$ 0.0
Repayments of long-term debt \| $		1,464.0
Business Combination
Subsidiary, Sale of Stock [Line Items]
Consideration transferred \| $		$ 1,526.2
Stock consideration transferred (in shares)		118,261,955
Value of stock consideration transferred (USD per share) \| $ / shares		$ 10.00
IPO
Subsidiary, Sale of Stock [Line Items]
Stock issued (in shares)			69,000,000
Stock issued price (USD per share) \| $ / shares			$ 10.00
Consideration received on sale of stock, before issuance costs \| $			$ 690.0
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Stock issued (in shares)			9,000,000
Over-Allotment Option \| Common Class A
Subsidiary, Sale of Stock [Line Items]
Stock issued (in shares)	3,000,000
Over-Allotment Option \| Warrant
Subsidiary, Sale of Stock [Line Items]
Stock issued (in shares)			10,533,333
Stock issued price (USD per share) \| $ / shares			$ 11.50
Private Placement
Subsidiary, Sale of Stock [Line Items]
Stock issued (in shares)		123,900,000
Stock issued price (USD per share) \| $ / shares			$ 1.50
Consideration received on sale of stock, net of issuance costs \| $		$ 1,239.0	$ 15.8