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DIVESTITURES - Summary of Components of Income from Discontinued Operations, Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 149.7	$ 174.3	$ 150.9
Income (loss) from discontinued operations, net of tax attributable to noncontrolling interest	0.9	(0.2)	0.4
Income from discontinued operations, net of tax attributable to controlling interest	148.8	174.5	150.5
Discontinued Operations, Held-for-sale or Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before income taxes	203.1	236.4	184.6
Income tax expense from discontinued operations	53.4	62.1	33.7
Income from discontinued operations, net of tax	149.7	174.3	150.9
Income (loss) from discontinued operations, net of tax attributable to noncontrolling interest	0.9	(0.2)	0.4
Income from discontinued operations, net of tax attributable to controlling interest	148.8	174.5	150.5
Discontinued Operations, Held-for-sale or Disposed of by Sale | HHI Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before income taxes	253.3	288.2	227.8
Discontinued Operations, Held-for-sale or Disposed of by Sale | Global Battery And Lighting
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before income taxes	(3.8)	(7.3)	4.1
Discontinued Operations, Held-for-sale or Disposed of by Sale | Corporate Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations before income taxes	$ 46.4	$ 44.5	$ 47.3

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