UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (DEFICIT) - USD ($) $ in Millions		Total	Common Share Capital	Treasury Share Capital	Additional Paid in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2022			377,368,837
Beginning balance at Dec. 31, 2022		$ 1,441.9	$ 0.0		$ 2,630.7	$ (1,142.6)	$ (46.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		50.3				50.3
Exercise of employee stock options (in shares)			246,653
Exercise of employee stock options		2.2			2.2
Stock-based compensation, net of withholding for tax (in shares)	[1]		14,730
Stock-based compensation, net of withholding for tax	[1]	5.4			5.4
Employee 401K match with Vertiv stock (in shares)			135,245
Employee 401K match with Vertiv stock		2.1			2.1
Exercise of warrants (in shares)	[2]		1,368,194
Exercise of warrants	[2]	21.6			21.6
Other comprehensive income (loss), net of tax		27.3					27.3
Ending balance (in shares) at Mar. 31, 2023			379,133,659
Ending balance at Mar. 31, 2023		1,550.8	$ 0.0		2,662.0	(1,092.3)	(18.9)
Beginning balance (in shares) at Dec. 31, 2022			377,368,837
Beginning balance at Dec. 31, 2022		1,441.9	$ 0.0		2,630.7	(1,142.6)	(46.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		227.6
Ending balance (in shares) at Sep. 30, 2023			381,349,156
Ending balance at Sep. 30, 2023		1,713.9	$ 0.0		2,698.3	(915.0)	(69.4)
Beginning balance (in shares) at Mar. 31, 2023			379,133,659
Beginning balance at Mar. 31, 2023		1,550.8	$ 0.0		2,662.0	(1,092.3)	(18.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		83.2				83.2
Exercise of employee stock options (in shares)			649,884
Exercise of employee stock options		7.8			7.8
Stock-based compensation, net of withholding for tax (in shares)	[3]		365,055
Stock-based compensation, net of withholding for tax	[3]	4.4			4.4
Employee 401K match with Vertiv stock (in shares)			217,041
Employee 401K match with Vertiv stock		2.8			2.8
Other comprehensive income (loss), net of tax		9.1					9.1
Ending balance (in shares) at Jun. 30, 2023			380,365,639
Ending balance at Jun. 30, 2023		1,658.1	$ 0.0		2,677.0	(1,009.1)	(9.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		94.1				94.1
Exercise of employee stock options (in shares)			892,030
Exercise of employee stock options		12.9			12.9
Stock-based compensation, net of withholding for tax (in shares)	[4]		6,465
Stock-based compensation, net of withholding for tax	[4]	6.2			6.2
Employee 401K match with Vertiv stock (in shares)			85,022
Employee 401K match with Vertiv stock		2.2			2.2
Other comprehensive income (loss), net of tax		(59.6)					(59.6)
Ending balance (in shares) at Sep. 30, 2023			381,349,156
Ending balance at Sep. 30, 2023		$ 1,713.9	$ 0.0		2,698.3	(915.0)	(69.4)
Beginning balance (in shares) at Dec. 31, 2023		381,788,876	381,788,876	0
Beginning balance at Dec. 31, 2023		$ 2,014.9	$ 0.0	$ 0.0	2,711.3	(691.9)	(4.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(5.9)				(5.9)
Exercise of employee stock options (in shares)			1,109,113
Exercise of employee stock options		14.4			14.4
Stock-based compensation, net of withholding for tax (in shares)	[5]		102,833
Stock-based compensation, net of withholding for tax	[5]	17.3			17.3
Employee 401K match with Vertiv stock (in shares)			44,968
Employee 401K match with Vertiv stock		2.2			2.2
Dividend		(9.3)				(9.3)
Repurchase of common stock (in shares)			(9,076,444)	(9,076,444)
Repurchase of common stock		(605.9)		$ (605.9)
Other comprehensive income (loss), net of tax		(34.3)					(34.3)
Ending balance (in shares) at Mar. 31, 2024			373,969,346	9,076,444
Ending balance at Mar. 31, 2024		$ 1,393.4	$ 0.0	$ (605.9)	2,745.2	(707.1)	(38.8)
Beginning balance (in shares) at Dec. 31, 2023		381,788,876	381,788,876	0
Beginning balance at Dec. 31, 2023		$ 2,014.9	$ 0.0	$ 0.0	2,711.3	(691.9)	(4.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 348.8
Ending balance (in shares) at Sep. 30, 2024		375,249,753	375,249,753	0
Ending balance at Sep. 30, 2024		$ 1,813.7	$ 0.0	$ 0.0	2,151.8	(371.2)	33.1
Beginning balance (in shares) at Mar. 31, 2024			373,969,346	9,076,444
Beginning balance at Mar. 31, 2024		1,393.4	$ 0.0	$ (605.9)	2,745.2	(707.1)	(38.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		178.1				178.1
Exercise of employee stock options (in shares)			693,261
Exercise of employee stock options		9.2			9.2
Stock-based compensation, net of withholding for tax (in shares)	[6]		412,459
Stock-based compensation, net of withholding for tax	[6]	(10.7)			(10.7)
Employee 401K match with Vertiv stock (in shares)			38,061
Employee 401K match with Vertiv stock		3.2			3.2
Dividend		(9.4)				(9.4)
Retirement of treasury stock (in shares)				(9,076,444)
Retirement of treasury stock		0.0		$ 605.9	(605.9)
Other comprehensive income (loss), net of tax		(26.3)					(26.3)
Ending balance (in shares) at Jun. 30, 2024			375,113,127	0
Ending balance at Jun. 30, 2024		1,537.5	$ 0.0	$ 0.0	2,141.0	(538.4)	(65.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		176.6				176.6
Exercise of employee stock options (in shares)			100,303
Exercise of employee stock options		1.4			1.4
Stock-based compensation, net of withholding for tax (in shares)	[7]		10,299
Stock-based compensation, net of withholding for tax	[7]	7.0			7.0
Employee 401K match with Vertiv stock (in shares)			26,024
Employee 401K match with Vertiv stock		2.4			2.4
Dividend		(9.4)				(9.4)
Other comprehensive income (loss), net of tax		$ 98.2					98.2
Ending balance (in shares) at Sep. 30, 2024		375,249,753	375,249,753	0
Ending balance at Sep. 30, 2024		$ 1,813.7	$ 0.0	$ 0.0	$ 2,151.8	$ (371.2)	$ 33.1

[1] Net stock compensation activity includes 14,730 shares withheld for taxes valued at $0.1 and stock-based compensation of $5.5.

[2] On February 24, 2023, GS Sponsor LLC elected to exercise 5,266,666 warrants on a cashless basis pursuant to the agreement governing the warrants, in exchange for which the Company issued 1,368,194 shares of Class A common stock.

[3] Net stock compensation activity includes 562,320 vested shares offset by 197,265 shares withheld for taxes valued at $2.4 and stock-based compensation of $6.8.

[4] Net stock compensation activity includes 10,707 vested shares offset by 4,242 shares withheld for taxes valued at $0.3 and stock-based compensation of $6.5.

[5] Net stock compensation activity includes 146,095 vested shares offset by 43,262 shares withheld for taxes valued at $3.0 and stock-based compensation of $9.2.

[6] Net stock compensation activity includes 606,060 vested shares offset by 193,601 shares withheld for taxes valued at $18.1 and stock-based compensation of $8.5.

[7] Net stock compensation activity includes 15,583 vested shares offset by 5,284 shares withheld for taxes valued at $0.4 and stock-based compensation of $8.1.