RESTRUCTURING CHARGES - Restructuring Reserve (Details) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2016 job_position	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2014 job_position
Restructuring Reserve [Roll Forward]
Liability Balance at period start		$ 33.9
Expense (Income), Net		5.2
Foreign Currency Translation		0.2
Cash utilized, net		(6.3)
Non-cash utilized, net		0.0
Liability Balance at period end		33.0	$ 33.9
EA Integration Restructuring Program
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other		4.5	72.2
Restructuring Reserve [Roll Forward]
Cash utilized, net		(48.0)
Number of positions eliminated | job_position	425
EA Integration Restructuring Program | Employee severance and other personnel benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other		5.2	62.8
Restructuring Reserve [Roll Forward]
Liability Balance at period start		25.8
Foreign Currency Translation		0.2
Cash utilized, net		(5.5)
Non-cash utilized, net		0.0
Liability Balance at period end		25.7	25.8
EA Integration Restructuring Program | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges and other		(1.8)	5.0
Restructuring Reserve [Roll Forward]
Liability Balance at period start		3.9
Expense (Income), Net		(0.7)
Foreign Currency Translation		0.0
Cash utilized, net		0.0
Non-cash utilized, net		0.0
Liability Balance at period end		3.2	3.9
EA Integration Restructuring Program | Inventory adjustments and other restructuring
Restructuring Reserve [Roll Forward]
Expense (Income), Net		1.1
2015 Efficiency Program
Restructuring Reserve [Roll Forward]
Expense (Income), Net		7.6
Cash utilized, net		(7.2)
December 2013 Program
Restructuring Reserve [Roll Forward]
Number of positions eliminated | job_position				1,100
December 2013 Program | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start		1.1
Expense (Income), Net		0.0
Foreign Currency Translation		0.0
Cash utilized, net		0.0
Non-cash utilized, net		0.0
Liability Balance at period end		1.1	1.1
Other immaterial actions | Employee severance and other personnel benefits
Restructuring Reserve [Roll Forward]
Liability Balance at period start		1.4
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		1.3	1.4
Other immaterial actions | Other
Restructuring Reserve [Roll Forward]
Liability Balance at period start		1.7
Expense (Income), Net		0.0
Foreign Currency Translation		0.0
Cash utilized, net		0.0
Non-cash utilized, net		0.0
Liability Balance at period end		$ 1.7	$ 1.7