Divestitures (Summary Of Components Of Income From Discontinued Operations Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes	$ 2.4	$ (93.3)
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
Gain on sale	2.4		$ 989.8
(Loss) Income from discontinued operations before income taxes	$ 2.4	15.9
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		107.2
(Loss) Income from discontinued operations before income taxes		(109.2)
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		161.0
Gross profit		88.0
Operating expenses		58.3
Operating income (loss)		29.7
Interest expense		13.3
Other non-operating expense, net		0.5
(Loss) Income from discontinued operations before income taxes		15.9
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		65.6
Cost of goods sold		39.3
Gross profit		26.3
Operating expenses		27.8
Operating income (loss)		(1.5)
Interest expense		0.5
Write-down of assets of business held for sale to fair value less cost to sell		107.2
(Loss) Income from discontinued operations before income taxes		$ (109.2)