GOODWILL AND INTANGIBLES (Tables)

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying value of goodwill were as follows:

	Chlor Alkali Products and Vinyls			Epoxy			Total
	($ in millions)
Balance at January 1, 2015	$	747.1		$	—		$	747.1
Acquisition activity	—			—			—
Balance at March 31, 2015	$	747.1		$	—		$	747.1
Balance at January 1, 2016	$	1,877.5		$	296.6		$	2,174.1
Acquisition activity	(23.3		)	(5.5		)	(28.8		)
Foreign currency translation adjustment	0.6			0.2			0.8
Balance at March 31, 2016	$	1,854.8		$	291.3		$	2,146.1

Schedule of Finite-Lived Intangible Assets

Intangible assets consisted of the following:

	March 31, 2016								December 31, 2015								March 31, 2015
	Gross Amount		Accumulated Amortization				Net		Gross Amount		Accumulated Amortization				Net		Gross Amount		Accumulated Amortization				Net
	($ in millions)
Customers, customer contracts and relationships	$	643.8		$	(75.9	)	$	567.9	$	641.0		$	(64.0	)	$	577.0	$	152.9		$	(44.7	)	$	108.2
Trade name	17.9			(2.7		)	15.2		17.9			—			17.9		10.9			—			10.9
Acquired technology	85.2			(5.7		)	79.5		84.7			(2.7		)	82.0		—			—			—
Other	2.3			(1.7		)	0.6		2.3			(1.7		)	0.6		2.3			(1.6		)	0.7
Total intangible assets	$	749.2		$	(86.0	)	$	663.2	$	745.9		$	(68.4	)	$	677.5	$	166.1		$	(46.3	)	$	119.8