OTHER COMPREHENSIVE INCOME - Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (39.1)	$ (49.0)
Benefit from income taxes	28.9	16.6
Other nonoperating expense	(0.3)	1.4
Net income (loss)	102.7	120.7
Reclassification From AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	1.7	1.7
Cash Flow Hedges | Reclassification From AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	0.5	0.5
Benefit from income taxes	(0.1)	(0.1)
Net income (loss)	0.4	0.4
Pension and Postretirement Benefit Plans | Reclassification From AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Benefit from income taxes	(0.4)	(0.4)
Other nonoperating expense	1.7	1.7
Net income (loss)	$ 1.3	$ 1.3