v3.5.0.2

Restructuring and Divestiture Costs - Chlorovinyls - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Feb. 24, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Loss on sale of business				$ (19.9)	$ 0.1
Solucor Business [Member]
Restructuring Cost and Reserve [Line Items]
Severance cost		$ 0.9
Concord Ontario [Member]
Restructuring Cost and Reserve [Line Items]
Severance cost				20.8
Specialty Phosgene [Member]
Restructuring Cost and Reserve [Line Items]
Severance cost			$ 0.4		$ 0.4
Solucor [Member]
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of assets	$ 9.2
Chlorovinyls [Member]
Restructuring Cost and Reserve [Line Items]
Severance cost		0.3		10.4
Chlorovinyls [Member] | Solucor [Member]
Restructuring Cost and Reserve [Line Items]
Loss on sale of business				(15.5)
Building Products [Member]
Restructuring Cost and Reserve [Line Items]
Severance cost		$ 0.6		2.7
Building Products [Member] | Concord Ontario [Member]
Restructuring Cost and Reserve [Line Items]
Loss on sale of business				$ (4.0)

X

- Definition

Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment.

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- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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-Section 50
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