SUPPLEMENTAL GUARANTOR INFORMATION (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Net sales	$ 993.7	$ 1,061.2
Operating costs and expenses:
Cost of sales	913.3	909.0
Selling, general and administrative expenses	73.6	68.3
Transaction-related costs and other, net	6.6	10.1
Long-lived asset impairment charges, net	0.6	2.6
Total operating costs and expenses	994.1	990.0
Operating income (loss)	(0.4)	71.2
Other income (expense):
Interest income (expense), net	(18.3)	(18.3)
Loss on redemption and other debt costs		(78.5)
Gain on acquisition of controlling interest		23.5
Foreign exchange gain (loss)	0.4	0.1
Loss before income taxes	(18.3)	(2.0)
Provision for (benefit from) income taxes	(7.7)	0.8
Consolidated net loss	(10.6)	(2.8)
Less net income attributable to noncontrolling interest	1.0	0.7
Net loss attributable to Axiall	(11.6)	(3.5)
Comprehensive loss attributable to Axiall	(24.9)	(11.2)
Guarantor Subsidiaries Including Eagle Spinco Inc | Transactions between Parent Company and Guarantor Subsidiaries | Restatement adjustment
Other income (expense):
Net loss attributable to Axiall		17.8
Reportable legal entity | Parent Company
Operating costs and expenses:
Selling, general and administrative expenses	10.9	8.2
Transaction-related costs and other, net	4.6	9.1
Total operating costs and expenses	15.5	17.3
Operating income (loss)	(15.5)	(17.3)
Other income (expense):
Interest income (expense), net	7.8	(16.5)
Loss on redemption and other debt costs		(66.1)
Foreign exchange gain (loss)	(0.1)	(0.1)
Equity in income (loss) of subsidiaries	(6.1)	66.0
Loss before income taxes	(13.9)	(34.0)
Provision for (benefit from) income taxes	(2.3)	(30.5)
Consolidated net loss	(11.6)	(3.5)
Net loss attributable to Axiall	(11.6)	(3.5)
Comprehensive loss attributable to Axiall	(24.9)	(11.2)
Reportable legal entity | Spinco | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Other income (expense):
Interest income (expense), net	(21.4)	(8.0)
Loss on redemption and other debt costs		(12.4)
Equity in income (loss) of subsidiaries	(28.3)	24.5
Loss before income taxes	(49.7)	4.1
Provision for (benefit from) income taxes	(6.2)	(6.2)
Consolidated net loss	(43.5)	10.3
Net loss attributable to Axiall	(43.5)	10.3
Comprehensive loss attributable to Axiall	(88.1)
Reportable legal entity | Guarantor Subsidiariess Excluding Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Supplemental Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Net sales	903.7	970.0
Operating costs and expenses:
Cost of sales	843.4	832.4
Selling, general and administrative expenses	42.8	42.5
Transaction-related costs and other, net	1.4	0.7
Long-lived asset impairment charges, net	0.4	2.6
Total operating costs and expenses	888.0	878.2
Operating income (loss)	15.7	91.8
Other income (expense):
Interest income (expense), net	0.6	11.9
Gain on acquisition of controlling interest		23.5
Foreign exchange gain (loss)	(0.1)
Equity in income (loss) of subsidiaries	3.0	2.4
Loss before income taxes	19.2	129.6
Provision for (benefit from) income taxes	2.0	40.1
Consolidated net loss	17.2	89.5
Net loss attributable to Axiall	17.2	89.5
Comprehensive loss attributable to Axiall	(26.6)	89.1
Reportable legal entity | Guarantor Subsidiaries Including Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Supplemental Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Net sales	905.6	971.7
Operating costs and expenses:
Cost of sales	845.3	834.9
Selling, general and administrative expenses	42.8	41.7
Transaction-related costs and other, net	1.4	0.7
Long-lived asset impairment charges, net	0.4	2.6
Total operating costs and expenses	889.9	879.9
Operating income (loss)	15.7	91.8
Other income (expense):
Interest income (expense), net	(20.9)	3.8
Loss on redemption and other debt costs		(12.4)
Gain on acquisition of controlling interest		23.5
Equity in income (loss) of subsidiaries	3.0	2.4
Loss before income taxes	(2.2)	109.1
Provision for (benefit from) income taxes	(4.2)	33.9
Consolidated net loss	2.0	75.2
Net loss attributable to Axiall	2.0	75.2
Comprehensive loss attributable to Axiall	(41.8)	89.1
Reportable legal entity | Non-Guarantor Subsidiaries | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Supplemental Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Net sales	143.4	135.6
Operating costs and expenses:
Cost of sales	123.3	120.2
Selling, general and administrative expenses	19.9	18.4
Transaction-related costs and other, net	0.6	0.3
Long-lived asset impairment charges, net	0.2
Total operating costs and expenses	144.0	138.9
Operating income (loss)	(0.6)	(3.3)
Other income (expense):
Interest income (expense), net	(5.2)	(5.6)
Foreign exchange gain (loss)	0.5	0.2
Loss before income taxes	(5.3)	(8.7)
Provision for (benefit from) income taxes	(1.2)	(2.6)
Consolidated net loss	(4.1)	(6.1)
Less net income attributable to noncontrolling interest	1.0	0.7
Net loss attributable to Axiall	(5.1)	(6.8)
Comprehensive loss attributable to Axiall	(9.8)	(9.2)
Eliminations
Supplemental Condensed Consolidating Statement of Operations and Comprehensive Income (Loss)
Net sales	(55.3)	(46.1)
Operating costs and expenses:
Cost of sales	(55.3)	(46.1)
Total operating costs and expenses	(55.3)	(46.1)
Other income (expense):
Equity in income (loss) of subsidiaries	3.1	(68.4)
Loss before income taxes	3.1	(68.4)
Consolidated net loss	3.1	(68.4)
Net loss attributable to Axiall	3.1	(68.4)
Comprehensive loss attributable to Axiall	$ 51.6	$ (79.9)