INCOME TAXES - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
Mar. 31, 2019 |
Mar. 31, 2018 |
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| Income Tax Examination [Line Items] | ||||||
| Federal tax rate | 21.00% | 31.50% | ||||
| Effective Income Tax Rate Reconciliation, Percent | (4.70%) | 10.10% | (1.40%) | 10.10% | ||
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 127.2 | $ 127.2 | ||||
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 109.0 | 109.0 | ||||
| Income Tax Examination, Penalties and Interest Accrued | 0.9 | 0.9 | ||||
| Tax liability related to an settlement | 1.6 | |||||
| Deferred Tax Asset [Member] | ||||||
| Income Tax Examination [Line Items] | ||||||
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 121.8 | 121.8 | ||||
| Other Noncurrent Liabilities [Member] | ||||||
| Income Tax Examination [Line Items] | ||||||
| Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 5.4 | $ 5.4 | ||||
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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