Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.18)	$ (0.12)	$ (0.04)	$ (0.36)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0.00	(0.29)	2.38	1.01
Income (Loss) from Continuing Operations, Per Basic Share	(0.18)	(0.12)	(0.04)	(0.36)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	$ 0.00	$ (0.29)	$ 2.38	$ 1.01
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ (37.5)	$ (24.4)	$ (8.7)	$ (71.6)
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6	393	44	846
Equity Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	976	1,820	1,275	1,708
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	125	235	113	177