Segment Information (Schedule Of Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	$ 67.7	$ 41.6	$ 22.0	$ 67.0
Corporate	5.5	4.0	10.8	11.5
Interest expense	35.5	94.2	70.4	151.2
Depreciation and amortization	36.4	36.6	78.0	102.6
Share and incentive based compensation	14.6	17.3	29.1	23.2
Restructuring and related charges	21.9	12.6	49.4	21.5
Transaction related charges	7.2	5.3	11.3	11.6
(Gain) loss on assets held for sale	(7.0)		25.7
Write-off from impairment of intangible assets			24.2
Loss on Energizer investment	106.8	5.0	68.3	5.0
Foreign currency translation on multicurrency divestiture loans	3.1	21.8	0.4	21.8
GPC safety recall				0.6
Salus	0.1		0.4
Other		(0.5)	0.5	2.3
Loss from operations before income taxes	(78.2)	(76.7)	(115.2)	(109.0)
Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	145.9	119.6	253.3	242.3
SB/RH [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	71.6	42.8	26.7	69.4
Corporate	2.3	3.3	7.2	9.9
Interest expense	35.3	48.3	70.0	91.5
Depreciation and amortization	36.4	36.6	78.0	102.6
Share and incentive based compensation	14.1	16.9	28.5	22.5
Restructuring and related charges	21.9	12.6	49.4	21.5
Transaction related charges	7.2	5.3	11.3	11.6
(Gain) loss on assets held for sale	(7.0)		25.7
Write-off from impairment of intangible assets			24.2
Loss on Energizer investment	106.8	5.0	68.3	5.0
Foreign currency translation on multicurrency divestiture loans	3.0	21.8	0.4	21.8
GPC safety recall				0.6
Other		(0.5)	0.4	2.4
Loss from operations before income taxes	(74.1)	(29.7)	(110.1)	(47.1)
SB/RH [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	145.9	119.6	253.3	242.3
Hardware & Home Improvement [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and related charges	0.2	0.4	0.7	3.2
Hardware & Home Improvement [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	69.5	52.7	112.3	108.2
Hardware & Home Improvement [Member] \| SB/RH [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	69.5	52.7	112.3	108.2
Home And Personal Care [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and related charges	1.7	1.3	2.8	1.5
Home And Personal Care [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	8.0	4.5	44.4	39.5
Home And Personal Care [Member] \| SB/RH [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	8.0	4.5	44.4	39.5
Global Pet Care [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and related charges	6.4	2.3	16.7	4.9
Global Pet Care [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	40.0	32.8	71.5	61.9
Global Pet Care [Member] \| SB/RH [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	40.0	32.8	71.5	61.9
Home and Garden Business [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and related charges	0.2	0.3	0.4	1.0
Home and Garden Business [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	28.4	29.6	25.1	32.7
Home and Garden Business [Member] \| SB/RH [Member] \| Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	$ 28.4	$ 29.6	$ 25.1	$ 32.7

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