EMPLOYEE BENEFIT PLANS (Funds Invested in Equity, Fixed income, and Other Investments and Fair Values of Pension Plan Assets by Asset Category) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Target plan asset allocations	100.00%
Plan asset allocations	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure
Target plan asset allocations	16.00%
Plan asset allocations	16.00%	18.00%
Fixed income securities
Defined Benefit Plan Disclosure
Target plan asset allocations	79.00%
Plan asset allocations	79.00%	78.00%
Other
Defined Benefit Plan Disclosure
Target plan asset allocations	5.00%
Plan asset allocations	5.00%	4.00%
Pension Benefits
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 111.7	$ 113.4	$ 143.9
Pension Benefits | International equity mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	18.3	20.1
Pension Benefits | U.S. treasury and government agency securities
Defined Benefit Plan Disclosure
Fair value of plan assets	12.3	19.2
Pension Benefits | Fixed income mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	76.0	69.0
Pension Benefits | Insurance contracts
Defined Benefit Plan Disclosure
Fair value of plan assets	4.4	4.4
Pension Benefits | Cash and equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	0.7	0.7
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure
Fair value of plan assets	95.0	89.8
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1) | International equity mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	18.3	20.1
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. treasury and government agency securities
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fixed income mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	76.0	69.0
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1) | Insurance contracts
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	0.7	0.7
Pension Benefits | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure
Fair value of plan assets	16.7	23.6
Pension Benefits | Significant Other Observable Inputs (Level 2) | International equity mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Other Observable Inputs (Level 2) | U.S. treasury and government agency securities
Defined Benefit Plan Disclosure
Fair value of plan assets	12.3	19.2
Pension Benefits | Significant Other Observable Inputs (Level 2) | Fixed income mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Other Observable Inputs (Level 2) | Insurance contracts
Defined Benefit Plan Disclosure
Fair value of plan assets	4.4	4.4
Pension Benefits | Significant Other Observable Inputs (Level 2) | Cash and equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3)
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3) | International equity mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3) | U.S. treasury and government agency securities
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3) | Fixed income mutual funds
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3) | Insurance contracts
Defined Benefit Plan Disclosure
Fair value of plan assets	0.0	0.0
Pension Benefits | Significant Unobservable  Inputs (Level 3) | Cash and equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0.0	$ 0.0