PENSION PLANS AND RETIREMENT BENEFITS (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 1.4	$ 2.2	$ 2.8	$ 4.5
Interest cost	26.4	15.5	52.7	30.9
Expected return on plans’ assets	(32.7)	(34.3)	(65.6)	(68.5)
Amortization of prior service cost	(0.1)	(0.2)	(0.2)	(0.4)
Recognized actuarial loss	0.3	8.6	0.6	17.2
Net periodic benefit (income) cost	(4.7)	(8.2)	(9.7)	(16.3)
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.2	0.3	0.4	0.6
Interest cost	0.4	0.3	0.9	0.6
Expected return on plans’ assets	0.0	0.0	0.0	0.0
Amortization of prior service cost	0.1	0.1	0.1	0.1
Recognized actuarial loss	0.2	0.5	0.4	1.0
Net periodic benefit (income) cost	$ 0.9	$ 1.2	1.8	2.3
Qualified Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 1.5	$ 0.8