SEGMENT INFORMATION (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended		44 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total sales	$ 570.4		$ 652.2		$ 1,147.8	$ 1,282.2
Income before taxes [Abstract]
Income from continuing operations before taxes	54.8		62.7		103.0	126.5
Restructuring charges	(2.3)	(1.0)	(0.2)	(2.3)	(3.3)	(2.5)	(62.2)
Other operating income	0.9		1.5		0.8	1.7
Interest expense	(9.6)		(9.7)		(19.3)	(18.8)
Interest income	0.4		0.1		0.7	0.2
Other income (expense)	0.1		(2.2)		0.1	(4.4)
Chlor Alkali Products
Segment Reporting Information [Line Items]
Total sales	338.5		367.0		666.8	715.9
Income before taxes [Abstract]
Income from continuing operations before taxes	40.8		50.2		75.1	108.7
Chemical Distribution
Segment Reporting Information [Line Items]
Total sales	75.6		113.4		144.8	223.8
Income before taxes [Abstract]
Income from continuing operations before taxes	0		2.2		(0.8)	6.3
Winchester
Segment Reporting Information [Line Items]
Total sales	181.0		198.1		381.6	386.1
Income before taxes [Abstract]
Income from continuing operations before taxes	33.1		37.1		71.4	68.4
Intersegment Elimination
Segment Reporting Information [Line Items]
Total sales	(24.7)		(26.3)		(45.4)	(43.6)
CorporateOther
Income before taxes [Abstract]
Pension income	7.5		6.4		15.4	12.7
Environmental expense	(1.2)		(2.4)		(4.7)	(4.2)
Other corporate and unallocated costs	(14.9)		(20.3)		(32.4)	(41.6)
Restructuring charges	$ (2.3)		$ (0.2)		$ (3.3)	$ (2.5)