Long-Term Debt - Schedule of Amortization and Accumulated Amortization of Deferred Financing Costs (Details) - USD ($) $ in Millions	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Jun. 02, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Disclosure [Abstract]
Amortization of deferred financing costs	$ 0.6	$ 0.6	$ 0.7	$ 7.5	$ 2.0
Accumulated amortization of deferred financing costs	$ 0.7		$ 0.7			$ 15.5