Purification Solutions Goodwill and Long-Lived Assets Impairment Charges (Tables)

12 Months Ended

Sep. 30, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Impairment Charges and Associated Deferred Tax Benefit

During the second quarter of fiscal 2018, the Company performed a long-lived asset impairment test and quantitative goodwill impairment test, which determined that the estimated fair value of the Purification Solutions reporting unit was lower than the reporting unit's carrying value. 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 Statements 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
Benefit for income taxes		(30	)
Impairment charges, after tax	$	224