STOCKHOLDERS' EQUITY AND LONG-TERM INCENTIVE COMPENSATION - Components of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 12.0	$ 12.1	$ 39.9	$ 34.7
Pre-tax	(81.5)	(66.0)	(209.3)	(177.5)
Amortization of unrecognized prior service credits - Pre-tax	3.2	1.4	2.6	7.1
Income taxes	18.4	15.1	42.0	32.2
Net income (loss)	(62.7)	(50.2)	(166.1)	(143.4)
Amount Reclassified from AOCI | Gains on qualifying cash flow hedges:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(1.4)	(2.3)	(3.0)	(7.1)
Pre-tax	(1.4)	(2.3)	(3.0)	(7.1)
Income taxes	0.4	0.6	0.7	1.9
Net income (loss)	(1.0)	(1.7)	(2.3)	(5.2)
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	(0.8)	(0.8)	(2.4)	(2.4)
Income taxes	0.2	0.2	0.7	0.6
Net income (loss)	$ (0.6)	$ (0.6)	$ (1.7)	$ (1.8)