MERGER WITH THE PPG CHEMICALS BUSINESS (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended	0 Months Ended
Jun. 30, 2013	Jun. 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
Debt assumed			967,000,000
Unaudited pro forma information
Net sales	1,272,800,000	2,441,700,000
Net income attributable to Axiall	$ 75,500,000	$ 66,600,000
Income per share attributable to Axiall - Basic (in dollars per share)	$ 1.08	$ 0.95
Income per share attributable to Axiall - Diluted (in dollars per share)	$ 1.07	$ 0.95

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