RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($)	3 Months Ended	5 Months Ended	28 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2019
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 28,300,000
Expense, Net	12,100,000
Foreign Currency Translation	(200,000)
Cash utilized, net	(7,700,000)
Non-cash utilized, net	(3,500,000)
Liability Balance at period end	29,000,000	$ 29,000,000	$ 29,000,000
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4,900,000
Expense, Net	11,700,000
Foreign Currency Translation	0
Cash utilized, net	(3,000,000)	(3,800,000)
Non-cash utilized, net	0
Liability Balance at period end	13,600,000	13,600,000	13,600,000
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3,700,000
Expense, Net	5,100,000
Foreign Currency Translation	0
Cash utilized, net	(1,800,000)
Non-cash utilized, net	0
Liability Balance at period end	7,000,000	7,000,000	7,000,000
2018 Optimization Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	1,200,000
Expense, Net	6,600,000
Foreign Currency Translation	0
Cash utilized, net	(1,200,000)
Non-cash utilized, net	0
Liability Balance at period end	6,600,000	6,600,000	6,600,000
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	18,000,000
Expense, Net	0
Foreign Currency Translation	(200,000)
Cash utilized, net	(3,100,000)		(67,000,000)
Non-cash utilized, net	(3,500,000)
Liability Balance at period end	11,200,000	11,200,000	11,200,000
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	13,800,000
Expense, Net	0
Foreign Currency Translation	(200,000)
Cash utilized, net	(3,000,000)
Non-cash utilized, net	0
Liability Balance at period end	10,600,000	10,600,000	10,600,000
EA Integration Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4,200,000
Expense, Net	0
Foreign Currency Translation	0
Cash utilized, net	(100,000)
Non-cash utilized, net	(3,500,000)
Liability Balance at period end	600,000	600,000	600,000
Other immaterial actions
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5,400,000
Expense, Net	400,000
Foreign Currency Translation	0
Cash utilized, net	(1,600,000)
Non-cash utilized, net	0
Liability Balance at period end	4,200,000	4,200,000	4,200,000
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4,600,000
Expense, Net	200,000
Foreign Currency Translation	0
Cash utilized, net	(1,100,000)
Non-cash utilized, net	0
Liability Balance at period end	3,700,000	3,700,000	3,700,000
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	800,000
Expense, Net	200,000
Foreign Currency Translation	0
Cash utilized, net	(500,000)
Non-cash utilized, net	0
Liability Balance at period end	$ 500,000	$ 500,000	$ 500,000