RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	9 Months Ended	11 Months Ended	34 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2019
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 28.3
Expense, Net	27.4
Foreign Currency Translation	(0.4)
Cash utilized, net	(25.3)
Non-cash utilized, net	(4.6)
Liability Balance at period end	25.4	$ 25.4	$ 25.4
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.9
Expense, Net	28.1
Foreign Currency Translation	0.0
Cash utilized, net	(15.0)	(15.8)
Non-cash utilized, net	0.0
Liability Balance at period end	18.0	18.0	18.0
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.7
Expense, Net	12.0
Foreign Currency Translation	0.0
Cash utilized, net	(6.8)
Non-cash utilized, net	0.0
Liability Balance at period end	8.9	8.9	8.9
2018 Optimization Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1.2
Expense, Net	16.1
Foreign Currency Translation	0.0
Cash utilized, net	(8.2)
Non-cash utilized, net	0.0
Liability Balance at period end	9.1	9.1	9.1
2018 Optimization Restructuring Program | Other | Selling, General and Administrative Expenses [Member]
Restructuring Reserve [Roll Forward]
Expense, Net	15.6
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	18.0
Expense, Net	0.4
Foreign Currency Translation	(0.4)
Cash utilized, net	(8.1)		(72.0)
Non-cash utilized, net	(3.5)
Liability Balance at period end	6.4	6.4	6.4
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	13.8
Expense, Net	0.4
Foreign Currency Translation	(0.4)
Cash utilized, net	(7.7)
Non-cash utilized, net	0.0
Liability Balance at period end	6.1	6.1	6.1
EA Integration Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.2
Expense, Net	0.0
Foreign Currency Translation	0.0
Cash utilized, net	(0.4)
Non-cash utilized, net	(3.5)
Liability Balance at period end	0.3	0.3	0.3
Other immaterial actions
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.4
Expense, Net	(1.1)
Foreign Currency Translation	0.0
Cash utilized, net	(2.2)
Non-cash utilized, net	(1.1)
Liability Balance at period end	1.0	1.0	1.0
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.6
Expense, Net	(1.4)
Foreign Currency Translation	0.0
Cash utilized, net	(1.8)
Non-cash utilized, net	(1.1)
Liability Balance at period end	0.3	0.3	0.3
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.8
Expense, Net	0.3
Foreign Currency Translation	0.0
Cash utilized, net	(0.4)
Non-cash utilized, net
Liability Balance at period end	$ 0.7	$ 0.7	$ 0.7