Divestitures (Summary Of Components Of Income From Discontinued Operations Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019	Sep. 30, 2019
Global Battery And Lighting [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Write-down of assets of business held for sale to fair value less cost to sell		$ 0.0		$ 0.0
Gain on sale	$ 1.4		$ 3.8		$ 989.8
Global Auto Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Write-down of assets of business held for sale to fair value less cost to sell				110.8
Discontinued Operations, Held-For-Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes	1.4	959.3	3.8	865.9
Discontinued Operations, Held-For-Sale [Member] | Global Battery And Lighting [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales				249.0
Cost of goods sold				164.6
Gross profit				84.4
Operating expenses		2.3		57.0
Operating (loss) income		(2.3)		27.4
Interest expense		10.0		23.3
Other non-operating expense, net				0.5
Gain on sale		(996.3)		(996.3)
Reclassification of accumulated other comprehensive income		18.5		18.5
(Loss) Income from discontinued operations before income taxes	$ 1.4	965.5	$ 3.8	981.4
Discontinued Operations, Held-For-Sale [Member] | Global Auto Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales		22.1		87.7
Cost of goods sold		13.2		52.5
Gross profit		8.9		35.2
Operating expenses		8.0		35.7
Operating (loss) income		0.9		(0.5)
Interest expense		0.2		0.7
Other non-operating expense, net		0.1		0.2
Write-down of assets of business held for sale to fair value less cost to sell		3.5		110.8
Reclassification of accumulated other comprehensive income		3.3		3.3
(Loss) Income from discontinued operations before income taxes		$ (6.2)		$ (115.5)