GUARANTOR INFORMATION (Details 2) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Guarantor Condensed Consolidating Statement of Operations and Comprehensive Loss
Net sales	$ 1,058.4	$ 1,236.9	$ 2,006.0	$ 2,230.6
Operating costs and expenses:
Cost of sales	929.8	1,090.0	1,774.4	2,003.3
Selling, general and administrative expenses	81.2	79.0	162.5	152.6
Transaction-related costs and other, net	4.6	9.4	10.4	16.0
Long-lived asset impairment charges, net		0.1	0.3	0.7
Total operating costs and expenses	1,015.6	1,178.5	1,947.6	2,172.6
Operating income	42.8	58.4	58.4	58.0
Other income (expense):
Interest income (expense), net	(19.5)	(19.1)	(38.3)	(37.4)
Foreign exchange gain (loss)	(0.3)	(0.3)	(0.5)	0.1
Loss on redemption and other debt costs			(3.2)
Income (loss) before income taxes	23.0	39.0	16.4	20.7
Provision for (benefit from) income taxes	1.1	10.9	3.3	3.2
Consolidated net income	21.9	28.1	13.1	17.5
Less: net income attributable to noncontrolling interest	1.3	0.9	3.1	1.9
Net income (loss) attributable to Axiall	20.6	27.2	10.0	15.6
Comprehensive (income) loss attributable to Axiall	29.0	37.1	(9.4)	12.2
Reportable legal entity | Parent Company
Operating costs and expenses:
Selling, general and administrative expenses	13.9	10.2	26.3	21.2
Transaction-related costs and other, net	2.5	4.4	6.5	9.0
Total operating costs and expenses	16.4	14.6	32.8	30.2
Operating income	(16.4)	(14.6)	(32.8)	(30.2)
Other income (expense):
Interest income (expense), net	4.5	7.8	10.5	15.5
Equity in income (loss) of subsidiaries	32.5	32.4	29.5	26.4
Income (loss) before income taxes	20.6	25.6	7.2	11.7
Provision for (benefit from) income taxes		(1.6)	(2.8)	(3.9)
Consolidated net income	20.6	27.2	10.0	15.6
Net income (loss) attributable to Axiall	20.6	27.2	10.0	15.6
Comprehensive (income) loss attributable to Axiall	29.0	37.1	(9.4)	12.2
Reportable legal entity | Spinco | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Other income (expense):
Interest income (expense), net	(19.8)	(21.8)	(40.7)	(43.3)
Loss on redemption and other debt costs			(0.1)
Equity in income (loss) of subsidiaries	(5.2)	(8.4)	(12.1)	(36.6)
Income (loss) before income taxes	(25.0)	(30.2)	(52.9)	(79.9)
Provision for (benefit from) income taxes	0.4	(5.3)	(5.2)	(11.5)
Consolidated net income	(25.4)	(24.9)	(47.7)	(68.4)
Net income (loss) attributable to Axiall	(25.4)	(24.9)	(47.7)	(68.4)
Comprehensive (income) loss attributable to Axiall	(15.7)	(20.8)	(22.6)	(108.9)
Reportable legal entity | Guarantor Subsidiaries Excluding Eagle Spinco Inc. | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Guarantor Condensed Consolidating Statement of Operations and Comprehensive Loss
Net sales	911.7	1,087.6	1,767.7	1,992.2
Operating costs and expenses:
Cost of sales	822.9	981.4	1,592.7	1,826.3
Selling, general and administrative expenses	46.3	47.6	95.6	90.5
Transaction-related costs and other, net	2.1	3.9	3.1	5.4
Long-lived asset impairment charges, net		0.1		0.6
Total operating costs and expenses	871.3	1,033.0	1,691.4	1,922.8
Operating income	40.4	54.6	76.3	69.4
Other income (expense):
Interest income (expense), net	(2.3)	0.4	(2.8)	1.0
Foreign exchange gain (loss)		(0.1)	(0.2)	(0.1)
Loss on redemption and other debt costs			(3.1)
Equity in income (loss) of subsidiaries	15.2	5.5	10.7	8.6
Income (loss) before income taxes	53.3	60.4	80.9	78.9
Provision for (benefit from) income taxes	0.6	14.6	10.2	16.6
Consolidated net income	52.7	45.8	70.7	62.3
Net income (loss) attributable to Axiall	52.7	45.8	70.7	62.3
Comprehensive (income) loss attributable to Axiall	61.1	49.6	49.1	22.1
Reportable legal entity | Guarantor Subsidiaries Including Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Guarantor Condensed Consolidating Statement of Operations and Comprehensive Loss
Net sales	911.7	1,087.6	1,767.7	1,992.2
Operating costs and expenses:
Cost of sales	822.9	981.4	1,592.7	1,826.3
Selling, general and administrative expenses	46.3	47.6	95.6	90.5
Transaction-related costs and other, net	2.1	3.9	3.1	5.4
Long-lived asset impairment charges, net		0.1		0.6
Total operating costs and expenses	871.3	1,033.0	1,691.4	1,922.8
Operating income	40.4	54.6	76.3	69.4
Other income (expense):
Interest income (expense), net	(22.2)	(21.6)	(43.5)	(42.3)
Foreign exchange gain (loss)		(0.1)	(0.2)	(0.1)
Loss on redemption and other debt costs			(3.2)
Equity in income (loss) of subsidiaries	15.2	5.5	10.7	8.6
Income (loss) before income taxes	33.4	38.4	40.1	35.6
Provision for (benefit from) income taxes	0.9	9.3	5.0	5.1
Consolidated net income	32.5	29.1	35.1	30.5
Net income (loss) attributable to Axiall	32.5	29.1	35.1	30.5
Comprehensive (income) loss attributable to Axiall	40.9	33.1	13.5	(9.6)
Reportable legal entity | Non-Guarantor Subsidiaries | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Guarantor Condensed Consolidating Statement of Operations and Comprehensive Loss
Net sales	202.3	215.3	342.2	358.6
Operating costs and expenses:
Cost of sales	162.5	174.6	285.6	297.2
Selling, general and administrative expenses	21.0	21.2	40.6	40.9
Transaction-related costs and other, net		1.1	0.8	1.6
Long-lived asset impairment charges, net			0.3	0.1
Total operating costs and expenses	183.5	196.9	327.3	339.8
Operating income	18.8	18.4	14.9	18.8
Other income (expense):
Interest income (expense), net	(1.8)	(5.3)	(5.3)	(10.6)
Foreign exchange gain (loss)	(0.3)	(0.2)	(0.3)	0.2
Income (loss) before income taxes	16.7	12.9	9.3	8.4
Provision for (benefit from) income taxes	0.2	3.2	1.1	2.0
Consolidated net income	16.5	9.7	8.2	6.4
Less: net income attributable to noncontrolling interest	1.3	0.9	3.1	1.9
Net income (loss) attributable to Axiall	15.2	8.8	5.1	4.5
Comprehensive (income) loss attributable to Axiall	25.0	14.1	(31.9)	5.2
Eliminations
Guarantor Condensed Consolidating Statement of Operations and Comprehensive Loss
Net sales	(55.6)	(66.0)	(103.9)	(120.2)
Operating costs and expenses:
Cost of sales	(55.6)	(66.0)	(103.9)	(120.2)
Total operating costs and expenses	(55.6)	(66.0)	(103.9)	(120.2)
Other income (expense):
Equity in income (loss) of subsidiaries	(47.7)	(37.9)	(40.2)	(35.0)
Income (loss) before income taxes	(47.7)	(37.9)	(40.2)	(35.0)
Consolidated net income	(47.7)	(37.9)	(40.2)	(35.0)
Net income (loss) attributable to Axiall	(47.7)	(37.9)	(40.2)	(35.0)
Comprehensive (income) loss attributable to Axiall	$ (65.9)	$ (47.2)	$ 18.4	$ 4.4