SHARE BASED COMPENSATION - Summary of Activity of the RSUs Granted (Details) $ / shares in Units, shares in Thousands, $ in Millions	6 Months Ended
	Mar. 31, 2024 USD ($) $ / shares shares
RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	440
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.83
Fair Value at Grant Date | $	$ 29.5
Time-based grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	200
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.75
Fair Value at Grant Date | $	$ 13.4
Time-based grants | Vesting in less than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	50
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.80
Fair Value at Grant Date | $	$ 3.6
Time-based grants | Vesting in more than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	150
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.73
Fair Value at Grant Date | $	$ 9.8
Performance-based grants | Vesting in more than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	240
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.90
Fair Value at Grant Date | $	$ 16.1
SB/RH | RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	420
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.86
Fair Value at Grant Date | $	$ 28.1
SB/RH | Time-based grants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	180
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.81
Fair Value at Grant Date | $	$ 12.0
SB/RH | Time-based grants | Vesting in less than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	30
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 67.17
Fair Value at Grant Date | $	$ 2.2
SB/RH | Time-based grants | Vesting in more than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	150
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.73
Fair Value at Grant Date | $	$ 9.8
SB/RH | Performance-based grants | Vesting in more than 12 months
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units (in shares) | shares	240
Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	$ 66.90
Fair Value at Grant Date | $	$ 16.1