PENSION, HEALTH CARE AND OTHER POSTRETIREMENT BENEFITS - Summary of the Obligation and the Assumptions Used for Postretirement Benefits Other than Pensions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Liabilities recognized in the Consolidated Balance Sheets:
Other accruals	$ (1,508.9)	$ (1,360.2)	$ (1,329.5)
Postretirement benefits other than pensions	(129.8)	(120.7)	(133.2)
Other Postretirement Benefits | Domestic
Benefit obligation:
Balances at beginning of year	135.1	147.2	153.8
Service cost	0.2	0.5	0.6
Interest cost	6.7	6.8	7.4
Actuarial gains	(2.3)	(8.6)	(8.0)
Benefits paid	(14.1)	(10.8)	(6.6)
Balances at end of year	125.6	135.1	147.2
Liabilities recognized in the Consolidated Balance Sheets:
Other accruals	(14.1)	(14.4)	(14.0)
Postretirement benefits other than pensions	(111.5)	(120.7)	(133.2)
Total liabilities recognized	(125.6)	(135.1)	(147.2)
Amounts recognized in AOCI:
Net actuarial gains	20.9	21.0	12.9
Prior service credits	1.9	16.2	40.0
Total amounts recognized	$ 22.8	$ 37.2	$ 52.9
Weighted-average assumptions used to determine benefit obligations:
Discount rate	5.35%	5.61%	4.97%
Health care cost trend rate - pre-65	7.00%	7.50%	7.00%
Health care cost trend rate - post-65	6.00%	6.50%	6.00%
Prescription drug cost increases	11.00%	11.75%	9.00%
Weighted-average assumptions used to determine net benefit cost:
Discount rate	5.61%	4.97%	5.16%
Health care cost trend rate - pre-65	7.50%	7.00%	6.25%
Health care cost trend rate - post-65	6.50%	6.00%	5.50%
Prescription drug cost increases	11.75%	9.00%	8.25%