PENSION PLANS AND RETIREMENT BENEFITS (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Benefits
Service cost	$ 1.3	$ 1.4
Interest cost	25.1	26.3
Expected return on plans’ assets	(33.9)	(32.9)
Amortization of prior service cost	(0.1)	(0.1)
Recognized actuarial loss	1.5	0.3
Net periodic benefit (income) cost	(6.1)	(5.0)
Other Postretirement Benefits
Service cost	0.2	0.2
Interest cost	0.4	0.5
Expected return on plans’ assets	0.0	0.0
Amortization of prior service cost	0.0	0.0
Recognized actuarial loss	0.2	0.2
Net periodic benefit (income) cost	$ 0.8	$ 0.9