Income Taxes (Schedule Of Deferred Tax Assets And Deferred Tax Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Line Items]
Employee benefits	$ 37.6	$ 24.8
Restructuring	0.9	0.5
Inventories and receivables	16.8	25.0
Marketing and promotional accruals	10.6	9.9
Property, plant and equipment	5.9	32.1
Unrealized losses	12.8	7.1
Intangibles	19.0	14.3
Investment in subsidiaries	0.3	16.9
Net operating loss and credit carry forwards	530.6	790.8
Other	32.7	30.2
Total deferred tax assets	667.2	951.6
Property, plant and equipment	11.1	51.4
Unrealized gains	9.0	7.3
Intangibles	311.8	416.4
Investment in partnership	37.6	52.0
Taxes on unremitted foreign earnings	5.0	6.2
Other	10.9	7.6
Total deferred tax liabilities	385.4	540.9
Net deferred tax liabilities	281.8	410.7
Valuation allowance	(307.0)	(282.6)	$ (888.3)
Net deferred tax liabilities, net valuation allowance	(25.2)	128.1
Deferred charges and other	30.7	163.1
Deferred taxes (noncurrent liability)	55.9	35.0
SB/RH [Member]
Income Taxes [Line Items]
Employee benefits	36.0	23.1
Restructuring	0.9	0.5
Inventories and receivables	16.8	25.0
Marketing and promotional accruals	10.6	9.9
Property, plant and equipment	5.9	31.2
Unrealized losses	12.8	7.1
Intangibles	19.0	14.3
Investment in subsidiaries	0.3	0.3
Net operating loss and credit carry forwards	229.8	281.8
Other	31.9	44.5
Total deferred tax assets	364.0	437.7
Property, plant and equipment	11.1	51.4
Unrealized gains	9.0	7.3
Intangibles	311.8	416.4
Investment in partnership	55.0	52.0
Taxes on unremitted foreign earnings	5.0	6.2
Other	10.8	7.6
Total deferred tax liabilities	402.7	540.9
Net deferred tax liabilities	(38.7)	(103.2)
Valuation allowance	(202.8)	(178.4)
Net deferred tax liabilities, net valuation allowance	(241.5)	(281.6)
Deferred charges and other	30.7	5.4
Deferred taxes (noncurrent liability)	$ 272.2	$ 287.0