MERGER WITH THE PPG CHEMICALS BUSINESS (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	9 Months Ended	0 Months Ended
Sep. 30, 2013	Jan. 28, 2013 Merged Business
Merger with the PPG chemical business
Purchase price		$ 2,800,000,000
Number of shares of common stock issued for acquisition		35.2
Value of shares of common stock issued for acquisition		1,800,000,000
Assumed debt		967,000,000
Unaudited pro forma information
Net sales	3,639,200,000
Net income attributable to Axiall	$ 106,300,000
Net income per share attributable to Axiall - Basic (in dollars per share)	$ 1.52
Net income per share attributable to Axiall - Diluted (in dollars per share)	$ 1.51

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