PENSION AND POST-RETIREMENT PLANS - FAIR VALUE (Details) - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension and Post-retirement Plans
Total	$ 206.3	$ 238.9	$ 212.8
Fair Value Measurement
Pension and Post-retirement Plans
Total	166.4	195.1
Total plan assets	206.4	239.5
Fair Value Measurement | Cash
Pension and Post-retirement Plans
Total	8.8	10.7
Fair Value Measurement | U S large-cap
Pension and Post-retirement Plans
Total	69.1	80.9
Fair Value Measurement | U S mid and small-cap
Pension and Post-retirement Plans
Total	41.5	61.7
Fair Value Measurement | International large-cap
Pension and Post-retirement Plans
Total	6.2	7.5
Fair Value Measurement | U S Treasuries
Pension and Post-retirement Plans
Total	17.4	9.6
Fair Value Measurement | Municipal bonds
Pension and Post-retirement Plans
Total	0.2
Fair Value Measurement | Investment grade U S corporate bonds
Pension and Post-retirement Plans
Total	22.8	24.5
Fair Value Measurement | Convertible Bonds
Pension and Post-retirement Plans
Total	0.3
Fair Value Measurement | International Fixed Income
Pension and Post-retirement Plans
Total	0.1
Fair Value Measurement | High-yield U.S. corporate bonds / Non-U.S. Bonds
Pension and Post-retirement Plans
Total		0.2
Fair Value Measurement | Quoted Prices in Active Markets (Level 1)
Pension and Post-retirement Plans
Total	125.6	160.8
Fair Value Measurement | Quoted Prices in Active Markets (Level 1) | Cash
Pension and Post-retirement Plans
Total	8.8	10.7
Fair Value Measurement | Quoted Prices in Active Markets (Level 1) | U S large-cap
Pension and Post-retirement Plans
Total	69.1	80.9
Fair Value Measurement | Quoted Prices in Active Markets (Level 1) | U S mid and small-cap
Pension and Post-retirement Plans
Total	41.5	61.7
Fair Value Measurement | Quoted Prices in Active Markets (Level 1) | International large-cap
Pension and Post-retirement Plans
Total	6.2	7.5
Fair Value Measurement | Significant Observable Inputs (Level 2)
Pension and Post-retirement Plans
Total	40.8	34.3
Fair Value Measurement | Significant Observable Inputs (Level 2) | U S Treasuries
Pension and Post-retirement Plans
Total	17.4	9.6
Fair Value Measurement | Significant Observable Inputs (Level 2) | Municipal bonds
Pension and Post-retirement Plans
Total	0.2
Fair Value Measurement | Significant Observable Inputs (Level 2) | Investment grade U S corporate bonds
Pension and Post-retirement Plans
Total	22.8	24.5
Fair Value Measurement | Significant Observable Inputs (Level 2) | Convertible Bonds
Pension and Post-retirement Plans
Total	0.3
Fair Value Measurement | Significant Observable Inputs (Level 2) | International Fixed Income
Pension and Post-retirement Plans
Total	0.1
Fair Value Measurement | Significant Observable Inputs (Level 2) | High-yield U.S. corporate bonds / Non-U.S. Bonds
Pension and Post-retirement Plans
Total		0.2
Fair Value Measurement | Investment measured at NAV
Pension and Post-retirement Plans
Total	$ 40.0	$ 44.4