MERGER WITH THE PPG CHEMICALS BUSINESS (Details) (USD $)	12 Months Ended				12 Months Ended		0 Months Ended	11 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jan. 28, 2013	Dec. 31, 2013 Bridge loan	Dec. 31, 2012 Bridge loan	Jan. 28, 2013 Merged Business	Dec. 31, 2013 Merged Business	Dec. 31, 2013 Merged Business Measurement Period Adjustments	Dec. 31, 2013 PHH	Dec. 31, 2012 PHH
Purchase price paid for the Merger
Purchase price							$ (2,800,000,000)
Value of shares of common stock issued for acquisition							1,800,000,000
Share price (in dollars per share)							$ 50.24
Debt assumed							967,000,000
Payment of fees and expenses in connection with the merger								56,300,000
Debt issuance costs	98,100,000	1,500,000	2,000,000					30,300,000
Deferred debt issuance cost	28,800,000	16,300,000						19,300,000
Professional and legal fees								26,000,000
Goodwill expected to be deductible for tax purposes								5,900,000
Allocation of the purchase price to assets acquired and liabilities assumed
Cash and cash equivalents							26,700,000	26,700,000
Receivables							236,700,000	234,300,000	(2,400,000)
Inventories							72,000,000	77,100,000	5,100,000
Prepaid expenses and other							11,900,000	7,600,000	(4,300,000)
Property, plant and equipment							957,300,000	926,900,000	(30,400,000)
Goodwill	1,969,100,000	404,900,000	401,300,000				1,454,300,000	1,572,700,000	118,400,000
Intangible assets							1,224,200,000	1,205,800,000	(18,400,000)
Other assets							42,500,000	42,200,000	(300,000)
Accounts payable							(97,800,000)	(96,600,000)	1,200,000
Income taxes payable							(4,700,000)	(4,700,000)
Accrued compensation							(20,600,000)	(20,600,000)
Other accrued taxes							(12,100,000)	(200,000)	11,900,000
Other accrued liabilities							(58,000,000)	(62,500,000)	(4,500,000)
Deferred income taxes	(84,900,000)						(614,900,000)	(681,400,000)	(66,500,000)
Pension and other postretirement benefits							(279,000,000)	(252,300,000)	26,700,000
Other non-current liabilities							(67,900,000)	(78,500,000)	(10,600,000)
Debt assumed							(967,000,000)	(967,000,000)
Noncontrolling interest							(130,300,000)	(130,000,000)	300,000
Total net assets acquired							1,773,300,000	1,799,500,000	26,200,000
Unaudited pro forma information
Net sales	4,773,700,000	4,977,400,000
Net income attributable to Axiall	162,700,000	271,800,000
Earnings per share from net income attributable to Axiall - Basic (in dollars per share)	$ 2.33	$ 3.88
Earnings per share from net income attributable to Axiall - Diluted (in dollars per share)	$ 2.31	$ 3.87
Additional disclosures
Estimated gain on acquisition of controlling interest	25,900,000									25,900,000	25,900,000
Merger inventory fair value purchase accounting adjustment	13,400,000	13,400,000
Financing fees associated with merger					11,000,000	11,000,000
Face amount of debt					$ 688,000,000	$ 688,000,000
Certificate of Amendment to Increase Authorized Shares
Common stock, shares authorized (in shares)	200,000,000	100,000,000		200,000,000