RESTRUCTURING CHARGES - Restructuring and Related Charges Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Charges incurred during period	$ 12.8	$ 20.2
2018 Optimization Restructuring Program
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	5.7
Charges incurred during period	33.8	4.5
Charges incurred through end of period	39.5	5.7
2018 Optimization Restructuring Program | Employee Severance and Other Personnel Benefits
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	4.5
Charges incurred during period	15.8	4.5
Charges incurred through end of period	20.3	4.5
2018 Optimization Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	4.5
Charges incurred during period	16.1
Charges incurred through end of period	20.6	4.5
2018 Optimization Restructuring Program | Inventory Adjustments
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	0.0
Charges incurred during period	4.9
Charges incurred through end of period	4.9	0.0
2018 Optimization Restructuring Program | Other Related Charges
Restructuring Reserve [Roll Forward]
Charges incurred during period	0.3	0.0
EA Integration Restructuring Program
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	82.2
Charges incurred during period	(1.9)	9.5
Charges incurred through end of period	80.3	82.2
EA Integration Restructuring Program | Employee Severance and Other Personnel Benefits
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	72.2
Charges incurred during period	(1.9)	9.4
Charges incurred through end of period	70.3	72.2
EA Integration Restructuring Program | Lease Termination and Other Costs
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	5.1
Charges incurred during period	0.0
Charges incurred through end of period	5.1	5.1
EA Integration Restructuring Program | Total Restructuring Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	77.3
Charges incurred during period	(1.9)
Charges incurred through end of period	75.4	77.3
EA Integration Restructuring Program | Inventory Adjustments
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	1.9
Charges incurred during period	0.0
Charges incurred through end of period	1.9	1.9
EA Integration Restructuring Program | Other Related Charges
Restructuring Reserve [Roll Forward]
Charges incurred through beginning of period	3.0
Charges incurred during period	0.0	0.1
Charges incurred through end of period	$ 3.0	$ 3.0