Divestitures (Summary Of Updates To Reflect Corrected Numbers) (Details) - USD ($) $ in Millions	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred charges and other	$ 74.0			$ 67.2
Total assets	5,102.6			5,246.0
Other current liabilities	184.8			214.2
Current liabilities	782.3			1,140.1
Deferred tax liabilities	64.8			50.6
Total liabilities	3,717.1			3,517.1
Accumulated earnings	217.3			223.8
Total shareholders' equity	1,376.9			1,720.9
Total equity	1,385.5	$ 1,244.8	$ 1,495.9	1,728.9	$ 1,884.0	$ 1,928.6	$ 1,436.6	$ 1,589.6
Total liabilities and equity	5,102.6			5,246.0
SB/RH
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred charges and other	56.8			51.7
Total assets	5,161.7			5,291.2
Other current liabilities	170.3			182.7
Income tax payable	13.2			238.7
Current liabilities	780.9			1,354.2
Deferred tax liabilities	265.9			251.4
Total liabilities	3,923.8			3,856.5
Accumulated earnings	(638.5)			(414.7)
Total shareholders' equity	1,227.7			1,425.1
Total equity	1,237.9	$ 1,153.3	$ 1,401.7	1,434.7	$ 1,590.4	$ 1,638.9	$ 1,479.1	$ 1,611.7
Total liabilities and equity	$ 5,161.7			5,291.2
As reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred charges and other				51.7
Total assets				5,230.5
Other current liabilities				216.0
Current liabilities				1,141.9
Deferred tax liabilities				55.9
Total liabilities				3,524.2
Accumulated earnings				201.2
Total shareholders' equity				1,698.3
Total equity				1,706.3
Total liabilities and equity				5,230.5
As reported | SB/RH
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax payable				240.5
Current liabilities				1,356.0
Deferred tax liabilities				272.2
Total liabilities				3,879.1
Accumulated earnings				(437.3)
Total shareholders' equity				1,402.5
Total equity				1,412.1
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred charges and other				15.5
Total assets				15.5
Other current liabilities				(1.8)
Current liabilities				(1.8)
Deferred tax liabilities				(5.3)
Total liabilities				(7.1)
Accumulated earnings				22.6
Total shareholders' equity				22.6
Total equity				22.6
Total liabilities and equity				15.5
Adjustment | SB/RH
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income tax payable				(1.8)
Current liabilities				(1.8)
Deferred tax liabilities				(20.8)
Total liabilities				(22.6)
Accumulated earnings				22.6
Total shareholders' equity				22.6
Total equity				$ 22.6