PENSION PLANS AND RETIREMENT BENEFITS (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Pension Benefits
Service Cost	$ 4.3	$ 3.3	$ 12.7	$ 9.2
Interest Cost	21.8	21.8	65.0	66.0
Expected return on plans' assets	(39.2)	(39.5)	(117.6)	(118.4)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	0.0	(0.1)	0.0	0.0
Recognized acturial loss	6.8	5.2	20.2	15.5
Net periodic benefit (income) cost	(6.3)	(9.3)	(19.7)	(27.7)
Other Postretirement Benefits
Service Cost	0.3	0.2	0.9	0.9
Interest Cost	0.3	0.3	1.1	1.2
Expected return on plans' assets	0.0	0.0	0.0	0.0
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(0.6)	(2.0)	(1.9)	(2.0)
Recognized acturial loss	0.6	0.2	1.9	1.8
Net periodic benefit (income) cost	$ 0.6	$ (1.3)	$ 2.0	$ 1.9