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Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.14	$ (0.24)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	2.37	1.30
Income (Loss) from Continuing Operations, Per Basic Share	0.14	(0.24)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	$ 2.39	$ 1.30
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 28.8	$ (47.2)
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,326
Equity Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		1,567
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		104

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