PENSION AND POST-RETIREMENT BENEFITS - Fair Value of Asset Categories (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	$ 342.3	$ 474.0
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	342.3	474.0	$ 463.0
Pension Plans | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	325.0	454.3
Pension Plans | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	184.0	235.0
Pension Plans | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	141.0	219.3
Pension Plans | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Investments measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	17.3	19.7
Pension Plans | Mutual Funds, Corporate Bonds | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	15.5	21.9
Pension Plans | Mutual Funds, Corporate Bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	15.5	21.9
Pension Plans | Mutual Funds, Corporate Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Corporate Bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Government Bonds | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	23.7	25.4
Pension Plans | Mutual Funds, Government Bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	23.7	25.4
Pension Plans | Mutual Funds, Government Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Government Bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, U.S. Large Cap Equiy | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.5	0.7
Pension Plans | Mutual Funds, U.S. Large Cap Equiy | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.5	0.7
Pension Plans | Mutual Funds, U.S. Large Cap Equiy | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, U.S. Large Cap Equiy | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, International Equities | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	14.1	15.8
Pension Plans | Mutual Funds, International Equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	14.1	15.8
Pension Plans | Mutual Funds, International Equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, International Equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Emerging Markets International Equity | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.4	2.8
Pension Plans | Mutual Funds, Emerging Markets International Equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.4	2.8
Pension Plans | Mutual Funds, Emerging Markets International Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Emerging Markets International Equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, U.S., Small/Mid Cap Equity | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.8	0.6
Pension Plans | Mutual Funds, U.S., Small/Mid Cap Equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.8	0.6
Pension Plans | Mutual Funds, U.S., Small/Mid Cap Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0
Pension Plans | Mutual Funds, U.S., Small/Mid Cap Equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0
Pension Plans | Mutual Funds, Cash and Cash Equivalents | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.7	0.3
Pension Plans | Mutual Funds, Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.7	0.3
Pension Plans | Mutual Funds, Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Other | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	4.7	1.2
Pension Plans | Mutual Funds, Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	4.7	1.2
Pension Plans | Mutual Funds, Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Mutual Funds, Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Fixed Income Securities, Government Bonds | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	57.5	85.9
Pension Plans | Fixed Income Securities, Government Bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Fixed Income Securities, Government Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	57.5	85.9
Pension Plans | Fixed Income Securities, Government Bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Corporate Bonds | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	19.1	27.5
Pension Plans | Common and Collective Funds, Corporate Bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	10.3	15.8
Pension Plans | Common and Collective Funds, Corporate Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	8.8	11.7
Pension Plans | Common and Collective Funds, Corporate Bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Government Bonds | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	21.1	42.1
Pension Plans | Common and Collective Funds, Government Bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	4.7	5.1
Pension Plans | Common and Collective Funds, Government Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	16.4	37.0
Pension Plans | Common and Collective Funds, Government Bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, U.S. Large Cap Equity | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	58.7	98.4
Pension Plans | Common and Collective Funds, U.S. Large Cap Equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	58.7	91.9
Pension Plans | Common and Collective Funds, U.S. Large Cap Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	6.5
Pension Plans | Common and Collective Funds, U.S. Large Cap Equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, U.S. Small/Mid Cap Equity | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	13.7	19.4
Pension Plans | Common and Collective Funds, U.S. Small/Mid Cap Equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	13.7	19.4
Pension Plans | Common and Collective Funds, U.S. Small/Mid Cap Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, U.S. Small/Mid Cap Equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, International Equities | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	53.3	74.8
Pension Plans | Common and Collective Funds, International Equities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.7	3.3
Pension Plans | Common and Collective Funds, International Equities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	51.6	71.5
Pension Plans | Common and Collective Funds, International Equities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Emerging Markets International Equity | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	21.8	27.5
Pension Plans | Common and Collective Funds, Emerging Markets International Equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	16.6	20.4
Pension Plans | Common and Collective Funds, Emerging Markets International Equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	5.2	7.1
Pension Plans | Common and Collective Funds, Emerging Markets International Equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Cash and Cash Equivalents | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.5	2.8
Pension Plans | Common and Collective Funds, Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.5	2.8
Pension Plans | Common and Collective Funds, Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Other | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.5	(0.4)
Pension Plans | Common and Collective Funds, Other | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds, Other | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	1.5	(0.4)
Pension Plans | Common and Collective Funds, Other | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Cash and Cash Equivalents | Total
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	14.4	7.6
Pension Plans | Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	14.4	7.6
Pension Plans | Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Cash and Cash Equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	0.0	0.0
Pension Plans | Common and Collective Funds | Investments measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	17.3	19.7
Pension Plans | Hedge Funds | Investments measured at Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Total Plan Assets at Fair Value	$ 0.0	$ 0.0