PENSION, HEALTH CARE AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Recognition of:
Settlement expense		$ 32.4
Postretirement Benefits Other than Pensions
Net periodic benefit cost:
Service cost	0.4	0.3
Interest cost	1.9	2.8
Expected return on assets
Recognition of:
Unrecognized prior service cost (credit)	(0.3)	(1.2)
Unrecognized actuarial loss	0.5	0.1
Ongoing pension cost	2.5	2.0
Settlement expense
Net periodic benefit cost	2.5	2.0
Domestic Defined Benefit Pension Plans | Defined Benefit Pension Plans
Net periodic benefit cost:
Service cost	1.1	0.9
Interest cost	0.8	1.2
Expected return on assets	(1.5)	(1.3)
Recognition of:
Unrecognized prior service cost (credit)	0.3	0.3
Unrecognized actuarial loss
Ongoing pension cost	0.7	1.1
Settlement expense		32.4
Net periodic benefit cost	0.7	33.5
Foreign Defined Benefit Pension Plans | Defined Benefit Pension Plans
Net periodic benefit cost:
Service cost	1.7	1.5
Interest cost	1.8	2.3
Expected return on assets	(2.6)	(2.4)
Recognition of:
Unrecognized prior service cost (credit)
Unrecognized actuarial loss	0.3	0.3
Ongoing pension cost	1.2	1.7
Settlement expense
Net periodic benefit cost	$ 1.2	$ 1.7