STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ (448.7)	$ (370.5)	$ (1,271.8)	$ (1,031.6)
Interest expense	10.2	2.6	18.0	7.3
Pre-tax	(48.1)	(10.0)	(144.6)	(49.1)
Amortization of unrecognized prior service credits - Pre-tax	0.2	24.6	(2.3)	19.8
Income taxes	12.4	(2.5)	31.5	4.5
Net income (loss)	20.4	(3.1)	(58.4)	(27.5)
Amount Reclassified from AOCI | Gains on qualifying cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Pre-tax	(2.4)	(0.9)	(6.8)	(0.2)
Income taxes	0.6	0.2	1.7	0.0
Net income (loss)	(1.8)	(0.7)	(5.1)	(0.2)
Amount Reclassified from AOCI | Gains on pension and postretirement items:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized prior service credits - Pre-tax	(1.0)	(1.1)	(3.0)	(3.3)
Income taxes	0.3	0.3	0.8	0.8
Net income (loss)	(0.7)	(0.8)	(2.2)	(2.5)
FX forward contracts | Amount Reclassified from AOCI | Gains on qualifying cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	0.0	(0.2)	0.0	(0.2)
Swaps | Amount Reclassified from AOCI | Gains on qualifying cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2.4)	$ (0.7)	$ (6.8)	$ 0.0