RESTRUCTURING CHARGES - Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended		14 Months Ended	37 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 26.4	$ 33.9
Expense, Net	12.8	20.2
Foreign Currency Translation	(0.2)	(0.4)
Cash utilized, net	(24.4)	(27.0)
Non-cash utilized, net	(4.6)	(0.3)
Liability Balance at period end	10.0	26.4	$ 10.0	$ 10.0
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.7	0.0
Expense, Net	33.8	4.5
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(14.1)	(0.8)	(25.9)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	5.7	3.7	5.7	5.7
2018 Optimization Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.7	0.0
Expense, Net	15.8	4.5
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(13.8)	(0.8)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	5.7	3.7	5.7	5.7
2018 Optimization Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.0	0.0
Expense, Net	0.3	0.0
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(0.3)	0.0
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	0.0	0.0	0.0	0.0
2018 Optimization Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Expense, Net	16.1
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Liability Balance at period start	17.2	29.7
Expense, Net	(1.9)	9.5
Foreign Currency Translation	(0.2)	(0.3)
Cash utilized, net	(8.0)	(21.4)		(71.9)
Non-cash utilized, net	(3.5)	(0.3)
Liability Balance at period end	3.6	17.2	3.6	3.6
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	13.8	25.8
Expense, Net	(1.9)	9.4
Foreign Currency Translation	(0.2)	(0.3)
Cash utilized, net	(7.7)	(21.1)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	4.0	13.8	4.0	4.0
EA Integration Restructuring Program | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	3.4	3.9
Expense, Net	0.0	0.1
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(0.3)	(0.3)
Non-cash utilized, net	(3.5)	(0.3)
Liability Balance at period end	0.4	3.4	0.4	0.4
EA Integration Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Expense, Net	(1.9)
Other immaterial actions
Restructuring Reserve [Roll Forward]
Liability Balance at period start	5.5
Expense, Net	(1.4)
Foreign Currency Translation	0.0
Cash utilized, net	(2.3)
Non-cash utilized, net	(1.1)
Liability Balance at period end	0.7	5.5	0.7	0.7
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start	4.6	2.5
Expense, Net	(1.4)	5.1
Foreign Currency Translation	0.0	0.0
Cash utilized, net	(1.8)	(3.0)
Non-cash utilized, net	(1.1)	0.0
Liability Balance at period end	0.3	4.6	0.3	0.3
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start	0.9	1.7
Expense, Net	0.0	1.1
Foreign Currency Translation	0.0	(0.1)
Cash utilized, net	(0.5)	(1.8)
Non-cash utilized, net	0.0	0.0
Liability Balance at period end	0.4	0.9	$ 0.4	$ 0.4
Other immaterial actions | Total other immaterial actions
Restructuring Reserve [Roll Forward]
Liability Balance at period start	$ 5.5	4.2
Expense, Net		6.2
Foreign Currency Translation		(0.1)
Cash utilized, net		(4.8)
Non-cash utilized, net		0.0
Liability Balance at period end		$ 5.5