INCOME TAXES - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Current tax expense:
U.S. Federal	$ 7.7	$ 3.0	$ 0.3
Foreign	24.7	32.6	2.2
State and local	(1.1)	2.4	0.2
Total current tax expense	31.3	38.0	2.7
Deferred tax (benefit) expense:
U.S. Federal	(26.5)	(64.8)	9.1
Foreign	(1.2)	5.9	1.1
State and local	(16.9)	(5.5)	14.4
Total deferred tax (benefit) expense	(44.6)	(64.4)	24.6
Income tax (benefit) expense	(13.3)	(26.4)	27.3
SB/RH
Current tax expense:
U.S. Federal	7.7	3.0	0.3
Foreign	24.7	32.6	2.2
State and local	(1.1)	2.4	0.2
Total current tax expense	31.3	38.0	2.7
Deferred tax (benefit) expense:
U.S. Federal	(25.8)	(63.4)	(5.1)
Foreign	(1.2)	5.9	1.1
State and local	(17.2)	(5.5)	15.8
Total deferred tax (benefit) expense	(44.2)	(63.0)	11.8
Income tax (benefit) expense	$ (12.9)	$ (25.0)	$ 14.5