Consolidated Statements of Cash Flow - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (327.3)	$ (140.8)	$ (314.0)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	60.3	57.1	60.4
Amortization	142.8	145.8	156.6
Deferred income taxes	(1.4)	(13.8)	(40.3)
Amortization of debt discount and issuance costs	10.5	27.9	25.5
Gain on sale of business	0.0	0.0	(6.9)
Loss on extinguishment of debt	174.0	0.0	0.0
Change in fair value of warrant liabilities	143.7	0.0	0.0
Asset impairments	21.0	0.0	0.0
Stock-based compensation	13.0	0.0	0.0
Changes in tax receivable agreement	21.3	0.0	0.0
Changes in operating working capital	(60.8)	(36.4)	(110.0)
Other	11.8	17.7	6.8
Net cash provided by (used for) operating activities	208.9	57.5	(221.9)
Cash flows from investing activities:
Capital expenditures	(44.4)	(47.6)	(64.6)
Investments in capitalized software	(8.3)	(22.7)	(41.2)
Proceeds from disposition of property, plant and equipment	7.0	5.0	18.0
Acquisition of Business, net of cash acquired	0.0	0.0	(124.3)
Proceeds from sale of Business	0.0	0.0	4.4
Net cash provided by (used for) investing activities	(45.7)	(65.3)	(207.7)
Cash flows from financing activities:
Borrowings from ABL revolving credit facility	324.2	491.8	565.1
Repayments of ABL revolving credit facility	(470.5)	(591.2)	(320.0)
Proceeds from short-term borrowings	22.0	0.0	0.0
Repayment of short-term borrowings	(23.2)	0.0	0.0
Proceeds from the issuance of 10.00% Notes	0.0	114.2	0.0
Borrowing on Term Loan, net of discount	2,189.0	0.0	0.0
Repayment of Prior Notes	(1,370.0)	0.0	0.0
Payment of redemption premiums	(75.0)	0.0	0.0
Payment of debt issuance costs	(11.2)	0.0	0.0
Proceeds from reverse recapitalization, net	1,832.5	0.0	0.0
Payment to Vertiv Stockholder	(341.6)	0.0	0.0
Dividend Payment	(3.3)	0.0	0.0
Proceeds from the exercise of warrants	156.5	0.0	0.0
Other financing	(2.2)	0.0	0.0
Net cash provided by (used for) financing activities	140.7	14.8	245.1
Effect of exchange rate changes on cash and cash equivalents	5.0	1.4	11.6
Increase (decrease) in cash, cash equivalents and restricted cash	308.9	8.4	(172.9)
Beginning cash, cash equivalents and restricted cash	233.7	225.3	398.2
Ending cash, cash equivalents and restricted cash	542.6	233.7	225.3
Changes in operating working capital
Accounts receivable	(114.8)	39.8	(139.6)
Inventories	(38.5)	85.5	(73.7)
Other current assets	7.8	(41.6)	(66.5)
Accounts payable	78.2	(140.8)	101.9
Accrued expenses and other liabilities	13.3	34.8	50.2
Income taxes	(6.8)	(14.1)	17.7
Total changes in operating working capital	60.8	36.4	110.0
Supplemental Disclosures
Cash paid during the year for interest	190.7	271.5	259.6
Cash paid during the year for income tax, net	64.7	48.7	58.0
Property and equipment acquired during the year for capital lease obligations	5.4	1.8	4.2
Term Loan Due 2027
Cash flows from financing activities:
Repayment of Term Loan and Prior Term Loan	(16.5)	0.0	0.0
Term Loan Due 2023
Cash flows from financing activities:
Repayment of Term Loan and Prior Term Loan	$ (2,070.0)	$ 0.0	$ 0.0