v3.5.0.2

Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2015
Goodwill [Line Items] |  |  |  |
Goodwill impairment charge | $ (864.1) | $ (4.1) |  |
Gross goodwill at the beginning of the period | 1,951.0 | 1,969.1 |  |
Adjustments |  | 0.7 |  |
Foreign currency translation adjustment | (24.8) | (18.8) |  |
Gross goodwill at the end of the period | 1,062.1 | 1,951.0 | $ 1,969.1 |
Accumulated impairment losses | (210.0) | (210.0) |  |
Net goodwill at the end of the period | 852.1 | 1,741.0 |  |
Gross carrying amounts | 1,250.6 | 1,250.6 |  |
Accumulated impairment charges | (2.9) | (2.6) |  |
Accumulated amortization | (215.2) | (147.2) |  |
Foreign currency translation adjustment | (24.7) | (14.2) |  |
Net carrying amounts | 1,007.8 | 1,086.6 |  |
Amortization expense for the definite-lived intangible assets | 68.4 | 69.3 | 64.2 |
Year one | 66.4 |  |  |
Year two | 66.4 |  |  |
Year three | 66.4 |  |  |
Year four | 66.4 |  |  |
Year five | 66.4 |  |  |
Trade Names [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Indefinite-lived intangible assets, net of cumulative translation adjustment | 5.9 | 6.0 |  |
Gross carrying amounts | 6.0 | 6.0 |  |
Accumulated amortization | (1.0) | (0.7) |  |
Net carrying amounts | $ 5.0 | 5.3 |  |
Trade Names [Member] | Weighted Average [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Weighted average estimated useful life | 14 years |  |  |
Customer Relationships [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | $ 1,169.7 | 1,169.7 |  |
Accumulated impairment charges | (2.9) | (2.6) |  |
Accumulated amortization | (191.8) | (128.4) |  |
Foreign currency translation adjustment | (24.7) | (14.2) |  |
Net carrying amounts | $ 950.3 | 1,024.5 |  |
Customer Relationships [Member] | Weighted Average [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Weighted average estimated useful life | 15 years |  |  |
Supply Contracts [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | $ 42.6 | 42.6 |  |
Accumulated amortization | (6.3) | (4.1) |  |
Net carrying amounts | $ 36.3 | 38.5 |  |
Supply Contracts [Member] | Weighted Average [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Weighted average estimated useful life | 17 years |  |  |
Technology [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | $ 32.3 | 32.3 |  |
Accumulated amortization | (16.1) | (14.0) |  |
Net carrying amounts | $ 16.2 | 18.3 |  |
Technology [Member] | Weighted Average [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Weighted average estimated useful life | 16 years |  |  |
Compound, Mouldings and Siding Reporting Unit [Member] | Minimum [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Percentage that estimated fair values exceeded carrying values for the reporting unit |  |  |  | 10.00%
Compound and Siding Reporting Unit [Member] | Minimum [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Percentage that estimated fair values exceeded carrying values for the reporting unit | 10.00% |  |  |
Chlor-Alkali and Derivatives Reporting Unit [Member] | Maximum [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Percentage that estimated fair values exceeded carrying values for the reporting unit | 10.00% |  |  |
Chlorovinyls [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill impairment charge | $ (864.1) | (4.1) |  |
Gross goodwill at the beginning of the period | 1,790.8 | 1,808.8 |  |
Adjustments |  | 0.7 |  |
Foreign currency translation adjustment | (24.8) | (18.7) |  |
Gross goodwill at the end of the period | 901.9 | 1,790.8 | 1,808.8 |
Accumulated impairment losses | (59.6) | (59.6) |  |
Net goodwill at the end of the period | 842.3 | 1,731.2 |  |
Gross carrying amounts | 1,205.8 | 1,205.8 |  |
Accumulated impairment charges | (2.9) | (2.6) |  |
Accumulated amortization | (192.2) | (127.2) |  |
Foreign currency translation adjustment | (24.6) | (14.2) |  |
Net carrying amounts | 986.1 | 1,061.8 |  |
Chlorovinyls [Member] | Trade Names [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 6.0 | 6.0 |  |
Accumulated amortization | (1.0) | (0.7) |  |
Net carrying amounts | 5.0 | 5.3 |  |
Chlorovinyls [Member] | Customer Relationships [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 1,142.3 | 1,142.3 |  |
Accumulated impairment charges | (2.9) | (2.6) |  |
Accumulated amortization | (182.9) | (121.1) |  |
Foreign currency translation adjustment | (24.6) | (14.2) |  |
Net carrying amounts | 931.9 | 1,004.4 |  |
Chlorovinyls [Member] | Supply Contracts [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 42.6 | 42.6 |  |
Accumulated amortization | (6.3) | (4.1) |  |
Net carrying amounts | 36.3 | 38.5 |  |
Chlorovinyls [Member] | Technology [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 14.9 | 14.9 |  |
Accumulated amortization | (2.0) | (1.3) |  |
Net carrying amounts | 12.9 | 13.6 |  |
Building Products [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross goodwill at the beginning of the period | 160.2 | 160.3 |  |
Foreign currency translation adjustment |  | (0.1) |  |
Gross goodwill at the end of the period | 160.2 | 160.2 | $ 160.3 |
Accumulated impairment losses | (150.4) | (150.4) |  |
Net goodwill at the end of the period | 9.8 | 9.8 |  |
Gross carrying amounts | 44.8 | 44.8 |  |
Accumulated amortization | (23.0) | (20.0) |  |
Foreign currency translation adjustment | (0.1) |  |  |
Net carrying amounts | 21.7 | 24.8 |  |
Building Products [Member] | Customer Relationships [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 27.4 | 27.4 |  |
Accumulated amortization | (8.9) | (7.3) |  |
Foreign currency translation adjustment | (0.1) |  |  |
Net carrying amounts | 18.4 | 20.1 |  |
Building Products [Member] | Technology [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Gross carrying amounts | 17.4 | 17.4 |  |
Accumulated amortization | (14.1) | (12.7) |  |
Net carrying amounts | $ 3.3 | $ 4.7 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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