DEBT - Schedule of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2023	Sep. 30, 2023
Debt Instrument [Line Items]
Obligations under finance leases	$ 84.7	$ 86.4
Total Spectrum Brands, Inc. debt	1,414.5	1,573.9
Debt issuance costs	(17.9)	(18.4)
Less current portion	(8.8)	(8.6)
Long-term debt, net of current portion	$ 1,387.8	$ 1,546.9
Stated rate	5.30%	5.30%
4.00% Notes, due October 1, 2026
Debt Instrument [Line Items]
Senior notes	$ 470.1	$ 448.8
Stated rate	4.00%	4.00%
5.00% Notes, due October 1, 2029
Debt Instrument [Line Items]
Senior notes	$ 289.1	$ 297.2
Stated rate	5.00%	5.00%
5.50% Notes, due July 15, 2030
Debt Instrument [Line Items]
Senior notes	$ 155.7	$ 288.5
Stated rate	5.50%	5.50%
3.875% Notes, due March 15, 2031
Debt Instrument [Line Items]
Senior notes	$ 414.9	$ 453.0
Stated rate	3.875%	3.90%