Represents the number of segments that contain reporting units with goodwill and intangible assets.

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Represents the discount rate on future cash flows used in the impairment evaluation of the reporting unit.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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No definition available.

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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GOODWILL, OTHER INTANGIBLE ASSETS AND RESTRUCTURING (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
	Dec. 31, 2014 item	Dec. 31, 2013	Dec. 31, 2014	Jan. 28, 2013
GOODWILL, OTHER INTANGIBLE ASSETS AND RESTRUCTURING
Number of segments that contain reporting units with goodwill and intangible assets	2
Goodwill
Non-cash impairment charge to write-down definite-lived intangible assets	$ 2.6
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period	1,969.1us-gaap_GoodwillGross	404.9us-gaap_GoodwillGross
Addition from mergers and acquisitions		1,573.5us-gaap_GoodwillAcquiredDuringPeriod
Adjustments	0.7
Foreign currency translation adjustment	(18.8)us-gaap_GoodwillTranslationAdjustments	(9.3)us-gaap_GoodwillTranslationAdjustments
Gross goodwill at the end of the period	1,951.0us-gaap_GoodwillGross	1,969.1us-gaap_GoodwillGross	1,951.0us-gaap_GoodwillGross
Accumulated impairment losses at the end of the period	(210.0)	(205.9)	(210.0)
Net goodwill at the end of the period	1,741.0us-gaap_Goodwill	1,763.2us-gaap_Goodwill	1,741.0us-gaap_Goodwill
Merged Business
Goodwill
Net assets acquired		1,799.5		1,773.3
Changes made to goodwill by reportable segment
Net goodwill at the end of the period		1,572.7		1,454.3
Merged Business \| Impact of correction \| Overstatement of certain assets and deferred tax liabilities
Goodwill
Net assets acquired	0.7		0.7
Changes made to goodwill by reportable segment
Net goodwill at the end of the period	0.7		0.7
Chlorovinyls
Goodwill
Goodwill impairment charges			4.1
Non-cash impairment charge to write-down definite-lived intangible assets	2.6
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period	1,808.8	245.4
Addition from mergers and acquisitions		1,572.7
Adjustments	0.7
Foreign currency translation adjustment	(18.7)	(9.3)
Gross goodwill at the end of the period	1,790.8	1,808.8	1,790.8
Accumulated impairment losses at the end of the period	(59.6)	(55.5)	(59.6)
Net goodwill at the end of the period	1,731.2	1,753.3	1,731.2
Chlorovinyls \| Customer relationships
Goodwill
Non-cash impairment charge to write-down definite-lived intangible assets			2.6
Building Products
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period	160.3	159.5
Addition from mergers and acquisitions		0.8
Foreign currency translation adjustment	(0.1)
Gross goodwill at the end of the period	160.2	160.3	160.2
Accumulated impairment losses at the end of the period	(150.4)	(150.4)	(150.4)
Net goodwill at the end of the period	9.8	9.9	9.8
Restructuring charge	6.3	3.2
Window and door profiles
Goodwill
Discount rate on projected future cash flows used in impairment evaluation of reporting unit (as a percent)		15.00%
Goodwill impairment charges		18.2
Non-cash impairment charge to write down goodwill and other intangible assets		24.9
Window and door profiles \| Trade names
Goodwill
Non-cash impairment charge to write-down other indefinite-lived intangible assets		3.1
Window and door profiles \| Customer relationships
Goodwill
Non-cash impairment charge to write-down other indefinite-lived intangible assets		$ 3.6