Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
Jan. 03, 2021	Dec. 29, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	$ 213.1	$ 107.4
Corporate	9.0	5.2
Interest expense	36.7	34.8
Depreciation and amortization	35.7	41.7
Share and incentive based compensation	8.1	14.5
Restructuring and related charges	9.2	27.4
Transaction related charges	20.6	4.1
Gain on Energizer investment	(6.0)	(38.5)
Loss on assets held for sale	0.0	32.8
Write-off from impairment of intangible assets	0.0	24.2
Inventory acquisition step-up	0.8	0.0
Other	6.0	(1.8)
Income (loss) from continuing operations before income taxes	93.0	(37.0)
HHI
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	98.2	42.8
HPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	50.9	36.4
GPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	53.6	31.5
H&G
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	10.4	(3.3)
SB/RH
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	213.1	107.4
Corporate	8.5	4.9
Interest expense	36.8	34.6
Depreciation and amortization	35.7	41.7
Share and incentive based compensation	8.1	14.4
Restructuring and related charges	9.2	27.4
Transaction related charges	20.6	4.1
Gain on Energizer investment	(6.0)	(38.5)
Loss on assets held for sale	0.0	32.8
Write-off from impairment of intangible assets	0.0	24.2
Inventory acquisition step-up	0.8	0.0
Other	5.9	(2.3)
Income (loss) from continuing operations before income taxes	93.5	(35.9)
SB/RH \| HHI
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	98.2	42.8
SB/RH \| HPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	50.9	36.4
SB/RH \| GPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	53.6	31.5
SB/RH \| H&G
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	$ 10.4	$ (3.3)

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