CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Millions	Total	Preferred Stock [Member]	Preferred Stock [Member] Preferred Series B [Member]	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Excess of Capital over Par Value [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2018	$ (321.9)	$ 4.6		$ 0.8	$ 0.1	$ 61.2	$ (388.5)	$ (0.1)
Net income (loss)	(20.9)						(20.9)
Restricted and other common stock issued, net of amortization	(0.1)					(0.1)
Ending Balance at Mar. 31, 2019	(342.7)		$ 4.6	0.8	0.1	61.3	(409.4)	(0.1)
Beginning Balance at Dec. 31, 2018	(321.9)	4.6		0.8	0.1	61.2	(388.5)	(0.1)
Net income (loss)	(36.5)
Ending Balance at Jun. 30, 2019	(358.3)		4.6	0.8	0.1	61.3	(425.0)	(0.1)
Beginning Balance at Mar. 31, 2019	(342.7)		4.6	0.8	0.1	61.3	(409.4)	(0.1)
Net income (loss)	(15.6)						(15.6)
Ending Balance at Jun. 30, 2019	(358.3)		$ 4.6	0.8	0.1	61.3	(425.0)	(0.1)
Beginning Balance at Dec. 31, 2019	(336.9)	4.6		0.8	0.1	61.5	(405.0)	1.1
Net income (loss)	11.3						11.3
Restricted and other common stock issued, net of amortization	(0.2)					(0.3)		(0.1)
Ending Balance at Mar. 31, 2020	(325.4)	4.6		0.8	0.1	61.8	(393.7)	1.0
Beginning Balance at Dec. 31, 2019	(336.9)	4.6		0.8	0.1	61.5	(405.0)	1.1
Net income (loss)	45.0
Ending Balance at Jun. 30, 2020	(291.7)	4.6		0.8	0.1	61.9	(360.0)	0.9
Beginning Balance at Mar. 31, 2020	(325.4)	4.6		0.8	0.1	61.8	(393.7)	1.0
Net income (loss)	33.7
Restricted and other common stock issued, net of amortization	0.0					(0.1)		(0.1)
Ending Balance at Jun. 30, 2020	$ (291.7)	$ 4.6		$ 0.8	$ 0.1	$ 61.9	$ (360.0)	$ 0.9