GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2019

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, 2018	$	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
Foreign currency translation adjustment	0.1			—			0.1
Balance at December 31, 2019	$	1,832.7		$	287.0		$	2,119.7

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

Intangible assets consisted of the following:

		December 31,
		2019							2018
	Useful Lives	Gross Amount		Accumulated Amortization			Net		Gross Amount		Accumulated Amortization			Net
		($ in millions)
Customers, customer contracts and relationships	10-15 Years	$	673.5	$	(260.9	)	$	412.6	$	675.2	$	(211.9	)	$	463.3
Trade name	5 Years	7.0		(6.0		)	1.0		7.0		(4.6		)	2.4
Acquired technology	7 Years	85.1		(51.8		)	33.3		85.4		(39.6		)	45.8
Other	10 Years	1.8		(0.6		)	1.2		0.7		(0.6		)	0.1
Total intangible assets		$	767.4	$	(319.3	)	$	448.1	$	768.3	$	(256.7	)	$	511.6