Segment and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) - USD ($) $ in Millions	1 Months Ended	2 Months Ended	3 Months Ended							5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2019	Jun. 02, 2019	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 02, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Long-lived assets			$ 122.5			$ 73.0					$ 122.5	$ 73.0
Net revenues	$ 16.3	$ 40.3	77.7	$ 69.1	$ 66.1	76.0	$ 65.1	$ 65.2	$ 61.6	$ 106.4	163.1	267.9	$ 244.1
North America
Segment Reporting Information [Line Items]
Long-lived assets			62.4			34.0					62.4	34.0
Net revenues										50.1	81.8	131.4
Europe
Segment Reporting Information [Line Items]
Long-lived assets			$ 60.1			$ 39.0					60.1	39.0
Net revenues										$ 56.3	$ 81.3	$ 136.5