Goodwill And Intangible Assets (Changes In The Carrying Amount Of Goodwill By Reporting Segment) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Goodwill [Line Items]
Goodwill, beginning		$ 1,454.7	$ 1,461.8
Foreign currency impact		(9.7)	(7.1)
Impairment		(116.0)
Deferred Tax impact		(0.9)
Goodwill, ending	$ 1,328.1	1,328.1	1,454.7
Hardware & Home Improvement [Member]
Goodwill [Line Items]
Goodwill, beginning		704.3	708.7
Foreign currency impact		(2.2)	(4.4)
Impairment
Deferred Tax impact
Goodwill, ending	702.1	702.1	704.3
Global Pet Supplies [Member]
Goodwill [Line Items]
Goodwill, beginning		435.9	437.1
Foreign currency impact		(5.5)	(1.2)
Impairment
Deferred Tax impact
Goodwill, ending	430.4	430.4	435.9
Home And Garden [Member]
Goodwill [Line Items]
Goodwill, beginning		196.5	196.5
Foreign currency impact
Impairment
Deferred Tax impact		(0.9)
Goodwill, ending	195.6	195.6	196.5
Home And Personal Care [Member]
Goodwill [Line Items]
Goodwill, beginning		118.0	119.5
Foreign currency impact		(2.0)	(1.5)
Impairment	(116.0)	(116.0)
Deferred Tax impact
Goodwill, ending			$ 118.0