SEGMENT INFORMATION (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended			38 Months Ended	12 Months Ended				38 Months Ended	12 Months Ended							38 Months Ended	12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013 Chlor Alkali Products Segment [Member]	Dec. 31, 2012 Chlor Alkali Products Segment [Member]	Dec. 31, 2011 Chlor Alkali Products Segment [Member]	Dec. 31, 2010 Chlor Alkali Products Segment [Member]	Dec. 31, 2013 Chlor Alkali Products Segment [Member]	Dec. 31, 2013 Chemical Distribution [Member]	Dec. 31, 2012 Chemical Distribution [Member]	Dec. 31, 2011 Chemical Distribution [Member]	Dec. 31, 2013 Winchester Segment [Member]	Dec. 31, 2012 Winchester Segment [Member]	Dec. 31, 2011 Winchester Segment [Member]	Dec. 31, 2010 Winchester Segment [Member]	Dec. 31, 2013 Winchester Segment [Member]	Dec. 31, 2013 Corporate/Other [Member]	Dec. 31, 2012 Corporate/Other [Member]	Dec. 31, 2011 Corporate/Other [Member]	Dec. 31, 2013 Intersegment Elimination [Member]	Dec. 31, 2012 Intersegment Elimination [Member]	Dec. 31, 2011 Intersegment Elimination [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Synergies Transferred Between Segments									$ 11.8
Sales [Abstract]
Sales	562.1	670.7	652.2	630.0	587.6	581.2	508.7	507.2	2,515.0	2,184.7	1,961.1		1,412.3	1,428.9	1,389.1			406.4	156.3	0	777.6	617.6	572.0						(81.3)	(18.1)	0
Income before taxes [Abstract]
Income before taxes by segment									250.0	225.2	379.4		203.8	263.2	245.0			9.7	4.5	0	143.2	55.2	37.9			(62.6)	(51.8)	(46.7)
Restructuring charge									(5.5)	(8.5)	(10.7)	(58.9)	(3.7)	(2.3)	(2.8)	(28.0)	(36.8)				(1.8)	(6.2)	(7.0)	(6.2)	(22.1)
Acquisition costs									0	(8.3)	(0.8)
Other operating income									0.7	7.6	8.8
Interest expense									(38.6)	(26.4)	(30.4)
Interest income									0.6	1.0	1.2
Other (expense) income									(1.3)	(11.3)	175.1
Earnings of non-consolidated affiliates [Abstract]
Total earnings of non-consolidated affiliates									2.8	3.0	9.6		2.8	3.0	9.6
Depreciation and amortization expense [Abstract]
Total depreciation and amortization expense									135.3	110.9	99.3		102.1	88.9	85.6			15.4	5.5	0	14.9	13.6	10.9			2.9	2.9	2.8
Capital spending [Abstract]
Total capital spending									90.8	255.7	200.9		65.5	221.3	134.2			2.5	0.8	0	21.2	32.1	63.9			1.6	1.5	2.8
Assets [Abstract]
Total assets	2,802.8				2,777.7				2,802.8	2,777.7		2,802.8	1,695.8	1,781.8			1,695.8	335.3	379.7		339.2	340.7			339.2	432.5	275.5
Investments-Affiliated Companies (at equity) [Abstract]
Investments in non-consolidated affiliates	$ 21.6				$ 29.3				$ 21.6	$ 29.3		$ 21.6	$ 21.6	$ 29.3			$ 21.6