Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Detail of the Changes Made to Goodwill

The following table provides the detail of the changes made to goodwill during the years ended December 31, 2015 and 2014:

(In millions)	Chlorovinyls			Building Products			Total
Gross goodwill at January 1, 2014	$	1,808.8		$	160.3		$	1,969.1
Adjustments		0.7			—			0.7
Foreign currency translation adjustment		(18.7	)		(0.1	)		(18.8	)
Gross goodwill at December 31, 2014	$	1,790.8		$	160.2		$	1,951.0
Accumulated impairment losses		(59.6	)		(150.4	)		(210.0	)
Net goodwill at December 31, 2014	$	1,731.2		$	9.8		$	1,741.0
Gross goodwill at December 31, 2014	$	1,790.8		$	160.2		$	1,951.0
Goodwill impairment charges - current year		(864.1	)		—			(864.1	)
Foreign currency translation adjustment		(24.8	)		—			(24.8	)
Gross goodwill at December 31, 2015		901.9			160.2			1,062.1
Accumulated impairment losses - prior year		(59.6	)		(150.4	)		(210.0	)
Net goodwill at December 31, 2015	$	842.3		$	9.8		$	852.1

Detail of the Definite-Lived Intangible Assets by Reportable Segment

Chlorovinyls						Building Products						Total
(In millions)	December 31, 2015			December 31, 2014			December 31, 2015			December 31, 2014			December 31, 2015			December 31, 2014
Gross carrying amounts:
Customer relationships	$	1,142.3		$	1,142.3		$	27.4		$	27.4		$	1,169.7		$	1,169.7
Supply contracts		42.6			42.6			—			—			42.6			42.6
Technology		14.9			14.9			17.4			17.4			32.3			32.3
Trade names		6.0			6.0			—			—			6.0			6.0
Total		1,205.8			1,205.8			44.8			44.8			1,250.6			1,250.6
Accumulated impairment charges:
Customer relationships		(2.9	)		(2.6	)		—			—			(2.9	)		(2.6	)
Total		(2.9	)		(2.6	)		—			—			(2.9	)		(2.6	)
Accumulated amortization:
Customer relationships		(182.9	)		(121.1	)		(8.9	)		(7.3	)		(191.8	)		(128.4	)
Supply contracts		(6.3	)		(4.1	)		—			—			(6.3	)		(4.1	)
Technology		(2.0	)		(1.3	)		(14.1	)		(12.7	)		(16.1	)		(14.0	)
Trade names		(1.0	)		(0.7	)		—			—			(1.0	)		(0.7	)
Total		(192.2	)		(127.2	)		(23.0	)		(20.0	)		(215.2	)		(147.2	)
Foreign currency translation adjustment:
Customer relationships		(24.6	)		(14.2	)		(0.1	)		—			(24.7	)		(14.2	)
Total		(24.6	)		(14.2	)		(0.1	)		—			(24.7	)		(14.2	)
Net carrying amounts:
Customer relationships		931.9			1,004.4			18.4			20.1			950.3			1,024.5
Supply contracts		36.3			38.5			—			—			36.3			38.5
Technology		12.9			13.6			3.3			4.7			16.2			18.3
Trade names		5.0			5.3			—			—			5.0			5.3
Total	$	986.1		$	1,061.8		$	21.7		$	24.8		$	1,007.8		$	1,086.6