SEGMENT INFORMATION - Schedule of Segment Information (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	$ 306.2	$ 324.4	$ 438.7
Corporate	3.2	41.3	46.9
Interest expense	127.0	99.4	116.5
Depreciation	48.9	49.0	51.9
Amortization	42.3	50.3	65.1
Share based compensation	17.2	10.2	29.4
Restructuring charges	9.9	59.8	40.3
Global ERP transformation	11.4	13.1	4.3
Global productivity improvement program	0.0	5.1	21.2
Russia closing initiative	3.2	1.9	0.0
Impairment of equipment and operating lease assets	10.8	0.0	0.0
Impairment of goodwill	111.1	0.0	0.0
Impairment of intangible assets	120.7	0.0	0.0
Unallocated shared costs	18.0	27.6	26.9
Non-cash purchase accounting adjustments	1.9	8.3	7.3
Gain from remeasurement of contingent consideration liability	(1.5)	(28.5)	0.0
Legal and environmental	3.0	1.5	6.0
Gain on debt repurchase	(7.9)	0.0	0.0
HPC product disposal	20.6	0.0	0.0
Early settlement of foreign currency cash flow hedges	4.9	(5.1)	0.0
HPC product recall	7.7	5.5	0.0
Gain on Energizer investment	0.0	0.0	(6.9)
Other	5.6	4.8	0.1
Loss from operations before income taxes	(290.2)	(90.3)	(11.1)
HPC separation initiatives
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	4.2	19.1	14.2
Fiscal 2023 restructuring
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	7.4	0.0	0.0
Fiscal 2022 restructuring
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	0.4	9.8	0.0
Tristar
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	11.5	24.3	0.1
Rejuvenate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	6.8	10.8
Armitage acquisition and integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	1.4	10.9
Omega production integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	4.6	1.3
HHI divestiture
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	8.4	6.3	9.6
Coevorden operations divestiture
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	2.7	8.8	11.6
HPC brand portfolio transitions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	2.5	1.3	0.0
Other project costs
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	11.2	12.1	7.4
Energizer
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain on Energizer investment	0.0	0.0	(6.9)
GPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	190.6	168.6	212.1
GPC distribution center transition	0.0	35.8	15.2
H&G
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	72.5	86.2	124.0
HPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Adjusted EBITDA	43.1	69.6	102.6
SB/RH
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Corporate	2.6	39.9	44.9
Interest expense	120.5	99.8	116.8
Depreciation	48.9	49.0	51.9
Amortization	42.3	50.3	65.1
Share based compensation	15.7	9.1	27.7
Global ERP transformation	11.4	13.1	4.3
Global productivity improvement program	0.0	5.1	21.2
Russia closing initiative	3.2	1.9	0.0
Impairment of equipment and operating lease assets	10.8	0.0	0.0
Impairment of goodwill	111.1	0.0	0.0
Impairment of intangible assets	120.7	0.0	0.0
Unallocated shared costs	18.0	27.6	26.9
Non-cash purchase accounting adjustments	1.9	8.3	7.3
Gain from remeasurement of contingent consideration liability	(1.5)	(28.5)	0.0
Legal and environmental	3.0	1.5	6.0
Gain on debt repurchase	(7.9)	0.0	0.0
HPC product disposal	20.6	0.0	0.0
Early settlement of foreign currency cash flow hedges	4.9	(5.1)	0.0
HPC product recall	7.7	5.5	0.0
Gain on Energizer investment	0.0	0.0	(6.9)
Other	5.4	4.5	0.1
Loss from operations before income taxes	(281.4)	(87.9)	(7.7)
SB/RH \| HPC separation initiatives
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	4.2	19.1	14.2
SB/RH \| Fiscal 2023 restructuring
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	7.4	0.0	0.0
SB/RH \| Fiscal 2022 restructuring
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges	0.4	9.8	0.0
SB/RH \| Tristar
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	11.5	24.3	0.1
SB/RH \| Rejuvenate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	6.8	10.8
SB/RH \| Armitage acquisition and integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	1.4	10.9
SB/RH \| Omega production integration
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	0.0	4.6	1.3
SB/RH \| HHI divestiture
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	8.4	6.3	9.6
SB/RH \| Coevorden operations divestiture
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	2.7	8.8	11.6
SB/RH \| HPC brand portfolio transitions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	2.5	1.3	0.0
SB/RH \| Other project costs
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Transaction related charges	11.2	12.1	7.4
SB/RH \| Energizer
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gain on Energizer investment	0.0	0.0	(6.9)
SB/RH \| GPC
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
GPC distribution center transition	$ 0.0	$ 35.8	$ 15.2

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+ References

No definition available.

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

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