RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	9 Months Ended	21 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 33.9
Expense (Income), Net	14.3
Foreign Currency Translation	(0.3)
Cash utilized, net	(20.9)
Non-cash utilized, net	0.0
Liability Balance at period end	27.0	$ 27.0
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	29.7
Expense (Income), Net	12.0
Foreign Currency Translation	(0.2)
Cash utilized, net	(18.4)	(60.9)
Non-cash utilized, net	0.0
Liability Balance at period end	23.1	23.1
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	25.8
Expense (Income), Net	12.7
Foreign Currency Translation	(0.2)
Cash utilized, net	(17.6)
Non-cash utilized, net	0.0
Liability Balance at period end	20.7	20.7
EA Integration Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.9
Expense (Income), Net	(0.7)
Foreign Currency Translation	0.0
Cash utilized, net	(0.8)
Non-cash utilized, net	0.0
Liability Balance at period end	2.4	2.4
EA Integration Restructuring Program | Inventory adjustments and other restructuring
Restructuring Reserve [Roll Forward]
Expense (Income), Net	0.4
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	2.5
Expense (Income), Net	2.3
Foreign Currency Translation	0.0
Cash utilized, net	(2.5)
Non-cash utilized, net	0.0
Liability Balance at period end	2.3	2.3
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1.7
Expense (Income), Net	0.0
Foreign Currency Translation	(0.1)
Cash utilized, net	0.0
Non-cash utilized, net	0.0
Liability Balance at period end	1.6	1.6
Other immaterial actions | Inventory adjustments and other restructuring
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.2
Expense (Income), Net	2.3
Foreign Currency Translation	(0.1)
Cash utilized, net	(2.5)
Non-cash utilized, net	0.0
Liability Balance at period end	$ 3.9	$ 3.9