BENEFIT PLANS (Fair Values of Pension Plan Assets) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 634.9	$ 628.6
Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	634.9	628.6
Interest In Common/Collective Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	9.3	5.6
Private Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	3.7	3.6
Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	647.9	637.8
Fair Value, Inputs, Level 1 [Member] | Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Fair Value, Inputs, Level 1 [Member] | Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Fair Value, Inputs, Level 2 [Member] | Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	634.9	628.6
Fair Value, Inputs, Level 2 [Member] | Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	634.9	628.6
Fair Value, Inputs, Level 3 [Member] | Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.0
Fair Value, Inputs, Level 3 [Member] | Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 0.0	$ 0.0