GOODWILL, RESTRUCTURING AND OTHER INTANGIBLE ASSETS (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period		$ 404.9
Accumulated impairment losses at the beginning of the period		(187.7)
Net goodwill at the beginning of the period		217.2
Preliminary addition from the Transactions		1,526.2
Foreign currency translation adjustment		(5.2)
Gross goodwill at the end of the period	1,925.9	1,925.9
Accumulated impairment losses at the end of the period	(205.9)	(205.9)
Net goodwill at the end of the period	1,720.0	1,720.0
Chlorovinyls
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period		245.4
Accumulated impairment losses at the beginning of the period		(55.5)
Net goodwill at the beginning of the period		189.9
Preliminary addition from the Transactions		1,526.2
Foreign currency translation adjustment		(5.2)
Gross goodwill at the end of the period	1,766.4	1,766.4
Accumulated impairment losses at the end of the period	(55.5)	(55.5)
Net goodwill at the end of the period	1,710.9	1,710.9
Building Products
Changes made to goodwill by reportable segment
Gross goodwill at the beginning of the period		159.5
Accumulated impairment losses at the beginning of the period		(132.2)
Net goodwill at the beginning of the period		27.3
Gross goodwill at the end of the period	159.5	159.5
Accumulated impairment losses at the end of the period	(150.4)	(150.4)
Net goodwill at the end of the period	9.1	9.1
Restructuring charge	2.9	2.9
Window and Door Profiles
Goodwill
Discount rate on projected future cash flows used in impairment evaluation of reporting unit (as a percent)		15.00%
Non-cash impairment charge to write down goodwill and other intangible assets		24.9
Goodwill impairment charges		18.2
Window and Door Profiles | Trade names
Goodwill
Non-cash impairment charge to write down other intangible assets		3.1
Window and Door Profiles | Customer relationships
Goodwill
Non-cash impairment charge to write down other intangible assets		$ 3.6