Earnings/Loss per Share - Schedule of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		2 Months Ended	3 Months Ended			5 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 02, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 02, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ (10.5)	$ (10.5)	$ (15.8)	$ (3.2)	$ 1.9	$ (6.8)	$ (19.0)	$ (4.9)
Income allocated to participating preferred shares	0.0		0.0		0.0		0.0	0.0
Net income (loss) attributable to common stockholders for basic and diluted EPS	$ (10.5)		$ (15.8)		$ 1.9		$ (19.0)	$ (4.9)
Basic weighted average common shares outstanding (shares)	53,868,925		995		995		995	995
Denominator adjustments for diluted EPS:
Assumed exercise of warrants	0		0		0		0	0
Assumed vesting of RSUs	0		0		0		0	0
Dilutive weighted average common shares outstanding (shares)	53,868,925		995		995		995	995
Earnings (loss) per share attributable to common stockholders:
Earnings (loss) per share attributable to common stockholders, basic (in usd per share)	$ (0.19)		$ (15,807.96)		$ 1,859.17		$ (19,195.40)	$ (4,947.32)
Earnings (loss) per share attributable to common stockholders, diluted (in usd per share)	$ (0.19)		$ (15,807.96)		$ 1,859.17		$ (19,195.40)	$ (4,947.32)