GOODWILL AND INTANGIBLES (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2015	$	747.1	$	—	$	747.1
Balance at January 1, 2016	$	1,877.5	$	296.6	$	2,174.1
Acquisition activity	9.7		2.2		11.9
Foreign currency translation adjustment	0.2		0.1		0.3
Balance at June 30, 2016	$	1,887.4	$	298.9	$	2,186.3

Schedule of Finite-Lived Intangible Assets

Intangible assets consisted of the following:

	June 30, 2016								December 31, 2015								June 30, 2015
	Gross Amount		Accumulated Amortization				Net		Gross Amount		Accumulated Amortization				Net		Gross Amount		Accumulated Amortization				Net
	($ in millions)
Customers, customer contracts and relationships	$	672.3		$	(88.8	)	$	583.5	$	641.0		$	(64.0	)	$	577.0	$	152.9		$	(48.2	)	$	104.7
Trade name	17.9			(6.5		)	11.4		17.9			—			17.9		10.9			—			10.9
Acquired technology	84.9			(9.1		)	75.8		84.7			(2.7		)	82.0		—			—			—
Other	2.3			(1.8		)	0.5		2.3			(1.7		)	0.6		2.3			(1.7		)	0.6
Total intangible assets	$	777.4		$	(106.2	)	$	671.2	$	745.9		$	(68.4	)	$	677.5	$	166.1		$	(49.9	)	$	116.2