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Earnings Per Share - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations, Per Diluted Share | $ (0.16) | $ (0.09) | $ (0.12) | $ (0.24) | $ (0.27) | $ 0.95 | $ (0.46) | $ (0.46) | $ (0.61) | $ (0.23) | $ (1.51)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share | 0.03 | 0.10 | (0.29) | 1.30 | 0.23 | (1.60) | 0.34 | 0.28 | 1.14 | (0.77) | (1.30)
Income (Loss) from Continuing Operations, Per Basic Share | (0.16) | (0.09) | (0.12) | (0.24) | (0.27) | 0.96 | (0.46) | (0.46) | (0.61) | (0.23) | (1.51)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share | $ 0.03 | $ 0.10 | $ (0.29) | $ 1.30 | $ 0.23 | $ (1.63) | $ 0.34 | $ 0.28 | $ 1.14 | $ (0.77) | $ (1.30)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | $ (121.1) | $ (45.8) | $ (299.3)
Restricted Stock |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  |  | 466 | 1,914 | 2,667
Equity Option |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  |  | 1,727 | 1,300 | 1,334
Warrant [Member] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  |  |  |  |  |  |  |  | 154 | 1,200 | 1,800

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