BENEFIT PLANS (Fair Values of Pension Plan Assets) (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	$ 628.6	$ 662.9
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	59.1
Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	628.6	722.0
Interest In Common/Collective Trusts [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	5.6	134.3
Private Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	3.6	4.2
Total [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	637.8	860.5
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] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	0.1
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	0.1
Fair Value, Inputs, Level 2 [Member] | Debt Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	628.6	662.9
Fair Value, Inputs, Level 2 [Member] | Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	0.0	59.0
Fair Value, Inputs, Level 2 [Member] | Investments In The Fair Value Hierarchy [Member]
Defined Benefit Plan Disclosure [Line Items]
Total pension plan assets	628.6	721.9
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] | Equity 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