BENEFIT PLANS - Fair Values of Pension Plan Assets (Details) - Pension Plans, Defined Benefit - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 607.1	$ 647.9	$ 637.8
Level 1, Level 2, and Level 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	590.2	634.9
Level 1, Level 2, and Level 3 \| Debt funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	590.2	634.9
Level 1
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Level 1 \| Debt funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	590.2	634.9
Level 2 \| Debt funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	590.2	634.9
Level 3
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Level 3 \| Debt funds
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Fair Value Measured at Net Asset Value Per Share \| Interest in common/collective trusts (at NAV)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	13.1	9.3
Fair Value Measured at Net Asset Value Per Share \| Private partnerships (at NAV)
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 3.8	$ 3.7