GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

Changes in the carrying value of goodwill were as follows:

	Chlor Alkali Products and Vinyls			Epoxy			Total
	($ in millions)
Balance at January 1, 2017	$	1,831.3		$	286.7		$	2,118.0
Foreign currency translation adjustment	1.6			0.4			2.0
Balance at December 31, 2017	1,832.9			287.1			2,120.0
Foreign currency translation adjustment	(0.3		)	(0.1		)	(0.4		)
Balance at December 31, 2018	$	1,832.6		$	287.0		$	2,119.6

Schedule of Finite-Lived Intangible Assets [Table Text Block]

Intangible assets consisted of the following:

		December 31,
		2018							2017
	Useful Lives	Gross Amount		Accumulated Amortization			Net		Gross Amount		Accumulated Amortization			Net
		($ in millions)
Customers, customer contracts and relationships	10-15 Years	$	675.2	$	(211.9	)	$	463.3	$	679.5	$	(163.6	)	$	515.9
Trade name	5 Years	7.0		(4.6		)	2.4		7.1		(3.2		)	3.9
Acquired technology	7 Years	85.4		(39.6		)	45.8		86.1		(27.7		)	58.4
Other	10 Years	0.7		(0.6		)	0.1		2.3		(2.0		)	0.3
Total intangible assets		$	768.3	$	(256.7	)	$	511.6	$	775.0	$	(196.5	)	$	578.5