PENSION PLANS (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Components of Net Periodic Benefit (Income) Cost [Abstract]
Service cost	$ 11.3	$ 11.1	$ 9.4
Interest cost	94.7	86.3	86.6
Expected return on plans’ assets	(141.8)	(146.5)	(149.4)
Amortization of prior service cost	0.0	0.1	2.2
Recognized actuarial loss	27.0	34.5	24.8
Net periodic benefit (income) costs	(8.8)	(14.5)	(26.4)
Included in Other Comprehensive Loss (Pretax)
Liability adjustment	177.7	100.6	26.9
Amortization of prior service costs and actuarial losses	$ (27.0)	$ (34.6)	$ (27.0)