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Purification Solutions Goodwill and Long-Lived Assets Impairment Charges (Tables) | 9 Months Ended
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Jun. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Impairment Charges and Associated Tax Benefit | During the second quarter of fiscal 2018, the Company recorded impairment charges relating to the goodwill and long-lived assets of the Purification Solutions reporting unit, and an associated deferred tax benefit, in the Consolidated Statement of Operations as follows:
|  | Three Months Ended March 31, 2018 |
|  | (In millions) |
Purification Solutions goodwill impairment charge |  | $ | 92 |
Purification Solutions long-lived assets impairment charge |  |  | 162 |
Provision (benefit) for income taxes |  |  | (30 | )
Impairment charges, after tax |  | $ | 224 |

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