SEGMENT INFORMATION - Segment Total Assets Relating to Segments (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 3,958.9	$ 3,530.4
SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	4,044.4	3,607.7
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,539.3	3,189.4
Operating Segments | SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	3,539.3	3,189.4
Operating Segments | HPC
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,231.0	879.4
Operating Segments | HPC | SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,231.0	879.4
Operating Segments | GPC
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,461.8	1,456.9
Operating Segments | GPC | SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,461.8	1,456.9
Operating Segments | H&G
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	846.5	853.1
Operating Segments | H&G | SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	846.5	853.1
Corporate and shared operations
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	419.6	341.0
Corporate and shared operations | SB/RH
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 505.1	$ 418.3