Discontinued Operations	6 Months Ended
Mar. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	DISCONTINUED OPERATIONS In the first quarter of fiscal year 2021, we recorded a tax benefit of $10.3 primarily from the settlement of a state tax appeal related to the gain on the sale of our former Performance Materials Division in fiscal year 2017. The benefit is reflected within "Income from discontinued operations, net of tax" on our consolidated income statement for the six months ended 31 March 2021. Our consolidated statement of cash flows for the six months ended 31 March 2021 includes $6.7 received as part of the settlement.

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-URI http://asc.fasb.org/topic&trid=2155823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2122178

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