PENSION, HEALTH CARE AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONS (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Recognition of:
Settlement expense					$ (32.4)
Postretirement Benefits Other than Pensions
Net periodic benefit cost:
Service cost	$ 0.3	0.4		$ 1.1	1.1
Interest cost	2.0	2.8		5.7	8.4
Recognition of:
Unrecognized prior service cost (credit)	(0.3)	(1.3)		(0.8)	(3.8)
Unrecognized actuarial loss	0.5	0.1		1.5	0.4
Ongoing pension cost				7.5	6.1
Net periodic benefit cost	2.5	2.0		7.5	6.1
Domestic Benefit Plan | Defined Benefit Pension Plans
Net periodic benefit cost:
Service cost	1.2	0.7		3.4	2.6
Interest cost	0.8	1.2		2.4	3.6
Expected return on assets	(1.6)	(1.3)		(4.7)	(4.0)
Recognition of:
Unrecognized prior service cost (credit)	0.3	0.4		1.0	1.1
Ongoing pension cost				2.1	3.3
Settlement expense			$ 32.4		32.4
Net periodic benefit cost	0.7	1.0		2.1	35.7
Foreign Defined Benefit Pension Plans | Defined Benefit Pension Plans
Net periodic benefit cost:
Service cost	1.7	1.5		5.2	4.5
Interest cost	1.9	2.5		5.6	7.2
Expected return on assets	(2.6)	(2.8)		(7.8)	(7.7)
Recognition of:
Unrecognized actuarial loss	0.3	0.2		0.7	0.7
Ongoing pension cost				3.7	4.7
Net periodic benefit cost	$ 1.3	$ 1.4		$ 3.7	$ 4.7