DISCONTINUED OPERATIONS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax		$ 0.7	$ 33.2	$ 1.3
Disposed of by Sale | NATG
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations, net of tax	$ 22.7	0.7	33.2	1.3
Restitution receipts		(0.7)	(15.0)	(1.9)
Ongoing restitution proceedings		0.4	3.0	0.5
Resolution of certain liabilities		0.5
Income (loss) from discontinued operation, before income tax			31.7
Tax effect of discontinued operation expense (benefit)		0.2	$ 10.7	$ 0.5
Discontinued operations | NATG
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional exit costs, expected future charges		$ 0.5