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Amount of increase (decrease) from effect of exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies. Excludes amounts for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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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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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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Restatement of Previously Issued Unaudited Condensed Consolidated Interim Financial Statements (UNAUDITED) - Narrative (Details) - USD ($) $ in Millions	4 Months Ended	5 Months Ended	7 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 02, 2019	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments		$ (4.0)	$ 1.7	$ 1.7	$ (7.4)	$ 21.5
Net cash (used in) provided by operating activities		16.7		9.6	42.0	46.2
Net cash provided by (used in) financing activities		(14.4)		665.4	(7.7)	(14.2)
Effect of Exchange Rate Changes on Cash		1.2		0.1	(0.1)	0.4
Cash withdrawn from trust account		0.0		308.1	0.0	0.0
Payment of deferred registration costs		0.0		11.3	0.0	0.0
Goodwill		353.2	$ 448.8	448.8	355.7	360.3
Foreign currency (gain) loss		2.2		$ (0.7)	$ 4.2	$ (14.2)
Adjustment To Correct Error In Predecessor Periods \| Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Foreign currency translation adjustments		(27.6)
Net cash (used in) provided by operating activities		(7.8)
Net cash provided by (used in) financing activities		(1.1)
Effect of Exchange Rate Changes on Cash		$ 8.9
Adjustment to Correct Error In Successor Periods \| Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net cash provided by (used in) financing activities	$ (3.4)
Effect of Exchange Rate Changes on Cash	(7.9)
Cash withdrawn from trust account	308.1
Payment of deferred registration costs	(11.3)
Goodwill	10.0
Foreign currency (gain) loss	$ (2.5)