RESTRUCTURING CHARGE (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended				38 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5.5	$ 8.5	$ 10.7		$ 58.9
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					17.5
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.4	4.1	6.4		16.9
Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4.9	2.1	1.0		14.6
Pension and other postretirement benefits curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	0	1.1		4.1
Employee Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.6	2.2	2.2		5.1
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(0.4)	0.1	0		0.7
Winchester Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.8	6.2	7.0	6.2	22.1
Winchester Segment [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Winchester Segment [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					12.2
Winchester Segment [Member] | Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					1.4
Winchester Segment [Member] | Pension and other postretirement benefits curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					4.1
Winchester Segment [Member] | Employee Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					4.4
Winchester Segment [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Chlor Alkali Products Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.7	2.3	2.8	28.0	36.8
Chlor Alkali Products Segment [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					17.5
Chlor Alkali Products Segment [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					4.7
Chlor Alkali Products Segment [Member] | Facility Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					13.2
Chlor Alkali Products Segment [Member] | Pension and other postretirement benefits curtailment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0
Chlor Alkali Products Segment [Member] | Employee Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					0.7
Chlor Alkali Products Segment [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges					$ 0.7