Income Taxes Income Taxes - Schedule of Effective Tax Rate (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
Income Tax Disclosure [Abstract]
Income tax benefit at statutory rate	$ (5.0)	$ (4.2)	$ (3.3)	$ (4.8)
U.S. State income taxes	(0.7)	1.2	(0.1)	(0.2)
Tax related to foreign activities	0.5	2.3	(2.4)	0.1
U.S. Federal tax credits	0.0	(0.1)	(0.4)	(2.9)
Foreign currency gains/(losses)	0.0	0.0	0.8	(3.0)
Domestic production activities deduction	0.0	0.0	0.0	(0.9)
Remeasurement of deferred taxes related to the Act			(0.2)	(30.4)
Transition tax related to the Act			0.2	4.3
U.S. Foreign income tax credits from amended tax returns	0.0	0.0	(1.8)	(2.8)
Global intangible low-taxed income	0.0	0.3	0.6	0.0
Foreign-derived intangible income deduction	(0.1)	(0.6)	(0.5)	0.0
Non-deductible transaction costs	0.6	0.0	0.0	0.0
Other, net	(0.1)	(1.4)	(0.1)	(0.9)
Total	$ (4.9)	$ (2.7)	$ (7.1)	$ (41.4)
Effective tax rate, percent	20.50%	13.30%	45.00%	301.70%