Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 02, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current tax expense:
Federal	$ 1.1	$ 1.4	$ 2.8	$ 4.3
State	0.2	0.5	1.1	0.5
Foreign	1.3	2.2	3.2	6.0
Total current expense	2.6	4.1	7.0	10.8
Deferred tax expense (benefit):
Federal	(4.4)	(6.9)	(4.8)	(47.9)
State	(0.9)	0.8	(1.2)	0.1
Foreign	(2.2)	(0.7)	(8.0)	(4.3)
Total deferred tax expense (benefit)	(7.5)	(6.8)	(14.1)	(52.1)
Total	$ (4.9)	$ (2.7)	$ (7.1)	$ (41.4)