Restructuring And Related Charges (Summary Of Costs Incurred By Reporting Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 12.6	$ 20.3	$ 21.5	$ 37.5
Cumulative costs	109.4		109.4
Future costs to be incurred	11.1		11.1
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	8.2	2.5	10.9	3.8
Cumulative costs	19.5		19.5
Future costs to be incurred	10.6		10.6
Hardware & Home Improvement [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	0.4	13.6	3.2	28.8
Cumulative costs	83.4		83.4
Future costs to be incurred	0.5		0.5
Home And Personal Care [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	1.4	0.2	1.5	0.2
Cumulative costs	2.2		2.2
Global Pet Supplies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	2.3	3.7	4.9	4.4
Cumulative costs	2.6		2.6
Home and Garden [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	0.3	$ 0.3	1.0	$ 0.3
Cumulative costs	$ 1.7		$ 1.7