RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	6 Months Ended	8 Months Ended	31 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2019
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 28.3
Expense, Net	22.0
Foreign Currency Translation	(0.1)
Cash utilized, net	(17.8)
Non-cash utilized, net	(4.6)
Liability Balance at period end	27.8	$ 27.8	$ 27.8
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.9
Expense, Net	22.2
Foreign Currency Translation	0.0
Cash utilized, net	(11.7)	(12.5)
Non-cash utilized, net	0.0
Liability Balance at period end	15.4	15.4	15.4
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.7
Expense, Net	8.8
Foreign Currency Translation	0.0
Cash utilized, net	(4.6)
Non-cash utilized, net	0.0
Liability Balance at period end	7.9	7.9	7.9
2018 Optimization Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1.2
Expense, Net	13.4
Foreign Currency Translation	0.0
Cash utilized, net	(7.1)
Non-cash utilized, net	0.0
Liability Balance at period end	7.5	7.5	7.5
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	18.0
Expense, Net	1.3
Foreign Currency Translation	(0.1)
Cash utilized, net	(4.3)		(68.2)
Non-cash utilized, net	(3.5)
Liability Balance at period end	11.4	11.4	11.4
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	13.8
Expense, Net	1.3
Foreign Currency Translation	(0.1)
Cash utilized, net	(4.0)
Non-cash utilized, net	0.0
Liability Balance at period end	11.0	11.0	11.0
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	(0.3)
Non-cash utilized, net	(3.5)
Liability Balance at period end	0.4	0.4	0.4
Other immaterial actions
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.4
Expense, Net	(1.5)
Foreign Currency Translation	0.0
Cash utilized, net	(1.8)
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	(1.5)
Foreign Currency Translation	0.0
Cash utilized, net	(1.1)
Non-cash utilized, net	(1.1)
Liability Balance at period end	0.9	0.9	0.9
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.8
Expense, Net	0.0
Foreign Currency Translation	0.0
Cash utilized, net	(0.7)
Non-cash utilized, net
Liability Balance at period end	$ 0.1	$ 0.1	$ 0.1