SUPPLEMENTAL GUARANTOR INFORMATION (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Supplemental Condensed Consolidating Balance Sheet Information
Ownership interest (as a percent)	100.00%
Assets
Cash and cash equivalents	$ 86.5	$ 166.5	$ 69.2	$ 200.3
Receivables, net of allowance for doubtful accounts	529.7	548.8
Inventories	443.4	403.6
Prepaid expenses and other	34.9	31.6
Deferred income taxes	20.5	18.0
Total current assets	1,115.0	1,168.5
Property, plant and equipment, net	1,646.0	1,658.7
Goodwill	1,755.2	1,763.2
Customer relationships, net	1,081.6	1,101.8
Other intangible assets, net	71.6	72.9
Other assets, net	103.5	112.1
Total assets	5,772.9	5,877.2
Liabilities and Equity:
Current portion of long-term debt	2.8	2.8
Accounts payable	339.2	313.7
Interest payable	12.7	15.4
Income taxes payable	3.9	17.1
Accrued compensation	25.7	61.5
Other accrued current liabilities	127.9	132.6
Total current liabilities	512.2	543.1
Long-term debt, excluding the current portion of long-term debt	1,329.3	1,330.0
Lease financing obligation	100.6	104.7
Deferred income taxes	847.4	865.5
Pensions and other post-retirement benefits	125.9	129.8
Other non-current liabilities	166.0	175.8
Total liabilities	3,081.4	3,148.9
Equity:
Total Axiall stockholders' equity	2,574.7	2,608.9
Noncontrolling interest	116.8	119.4
Total equity	2,691.5	2,728.3
Total liabilities and equity	5,772.9	5,877.2
Splitco Notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)	4.625%	4.625%
4.875 Notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)	4.875%
Spinco and the other Guarantor Subsidiaries
Supplemental Condensed Consolidating Balance Sheet Information
Ownership interest (as a percent)	100.00%
Spinco | Splitco Notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)	4.625%	4.625%
Guarantor Subsidiaries Including Eagle Spinco Inc | Transactions between Parent Company and Guarantor Subsidiaries | Restatement adjustment
Assets
Receivables, net of allowance for doubtful accounts			17.8
Equity:
Total equity			17.8
Reportable legal entity | Parent Company
Assets
Receivables, net of allowance for doubtful accounts	128.0	162.5
Prepaid expenses and other	0.8	1.3
Total current assets	128.8	163.8
Property, plant and equipment, net	10.8	9.8
Long-term receivables - affiliates	1,312.3	1,328.6
Other assets, net	12.4	12.2
Investments in subsidiaries	1,757.3	1,747.7
Total assets	3,221.6	3,262.1
Liabilities and Equity:
Accounts payable	16.0	16.8
Interest payable	8.5	3.1
Accrued compensation		0.5
Other accrued current liabilities	23.2	12.9
Total current liabilities	47.7	33.3
Long-term debt, excluding the current portion of long-term debt	450.0	450.0
Deferred income taxes	25.2	31.0
Pensions and other post-retirement benefits	3.4	13.7
Other non-current liabilities	120.6	125.2
Total liabilities	646.9	653.2
Equity:
Total Axiall stockholders' equity	2,574.7	2,608.9
Total equity	2,574.7	2,608.9
Total liabilities and equity	3,221.6	3,262.1
Reportable legal entity | Spinco | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Assets
Other assets, net	12.8	13.2
Investments in subsidiaries	2,877.9	2,950.8
Total assets	2,890.7	2,964.0
Liabilities and Equity:
Current portion of long-term debt	2.8	2.8
Accounts payable	143.2	119.6
Interest payable	4.2	12.3
Total current liabilities	150.2	134.7
Long-term debt, excluding the current portion of long-term debt	879.3	880.0
Long-term payables - affiliates	900.0	900.0
Total liabilities	1,929.5	1,914.7
Equity:
Total Axiall stockholders' equity	961.2	1,049.3
Total equity	961.2	1,049.3
Total liabilities and equity	2,890.7	2,964.0
Reportable legal entity | Guarantor Subsidiariess Excluding Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Assets
Cash and cash equivalents	48.6	76.9	8.6	131.4
Receivables, net of allowance for doubtful accounts	467.4	482.2
Inventories	326.7	310.5
Prepaid expenses and other	24.8	26.1
Deferred income taxes	23.2	20.5
Total current assets	890.7	916.2
Property, plant and equipment, net	1,311.3	1,325.6
Goodwill	1,495.6	1,496.6
Customer relationships, net	921.8	935.2
Other intangible assets, net	71.3	72.9
Other assets, net	67.7	71.7
Investments in subsidiaries	309.5	312.9
Total assets	5,067.9	5,131.1
Liabilities and Equity:
Accounts payable	287.4	319.6
Income taxes payable	0.2	12.2
Accrued compensation	16.9	49.6
Other accrued current liabilities	71.2	86.5
Total current liabilities	375.7	467.9
Deferred income taxes	780.4	790.9
Pensions and other post-retirement benefits	113.7	107.0
Other non-current liabilities	123.9	116.4
Total liabilities	1,393.7	1,482.2
Equity:
Total Axiall stockholders' equity	3,674.2	3,648.9
Total equity	3,674.2	3,648.9
Total liabilities and equity	5,067.9	5,131.1
Reportable legal entity | Guarantor Subsidiaries Including Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Assets
Cash and cash equivalents	48.6	76.9	8.6	131.4
Receivables, net of allowance for doubtful accounts	451.9	478.7
Inventories	326.7	310.5
Prepaid expenses and other	24.8	26.1
Deferred income taxes	23.2	20.5
Total current assets	875.2	912.7
Property, plant and equipment, net	1,311.3	1,325.6
Goodwill	1,495.6	1,496.6
Customer relationships, net	921.8	935.2
Other intangible assets, net	71.3	72.9
Other assets, net	80.5	84.9
Investments in subsidiaries	309.5	312.9
Total assets	5,065.2	5,140.8
Liabilities and Equity:
Current portion of long-term debt	2.8	2.8
Accounts payable	415.0	435.7
Interest payable	4.2	12.3
Income taxes payable	0.2	12.2
Accrued compensation	16.9	49.6
Other accrued current liabilities	71.2	86.5
Total current liabilities	510.3	599.1
Long-term debt, excluding the current portion of long-term debt	879.3	880.0
Long-term payables - affiliates	900.0	900.0
Deferred income taxes	780.4	790.9
Pensions and other post-retirement benefits	113.7	107.0
Other non-current liabilities	123.9	116.4
Total liabilities	3,307.6	3,393.4
Equity:
Total Axiall stockholders' equity	1,757.6	1,747.4
Total equity	1,757.6	1,747.4
Total liabilities and equity	5,065.2	5,140.8
Reportable legal entity | Non-Guarantor Subsidiaries | 4.625 Notes, 4.875 Notes and Term Loan credit agreement
Assets
Cash and cash equivalents	37.9	89.6	60.6	68.9
Receivables, net of allowance for doubtful accounts	83.7	73.3
Inventories	116.7	93.1
Prepaid expenses and other	9.5	4.2
Deferred income taxes		0.2
Total current assets	247.8	260.4
Property, plant and equipment, net	323.9	323.3
Goodwill	259.6	266.6
Customer relationships, net	159.8	166.6
Other intangible assets, net	0.3
Other assets, net	10.6	15.0
Total assets	1,002.0	1,031.9
Liabilities and Equity:
Accounts payable	42.1	26.9
Income taxes payable	3.9	4.9
Accrued compensation	8.8	11.4
Other accrued current liabilities	36.2	35.9
Total current liabilities	91.0	79.1
Long-term payables - affiliates	412.3	428.6
Lease financing obligation	100.6	104.7
Deferred income taxes	41.8	43.6
Pensions and other post-retirement benefits	8.8	9.1
Other non-current liabilities	13.0	20.9
Total liabilities	667.5	686.0
Equity:
Total Axiall stockholders' equity	217.7	226.5
Noncontrolling interest	116.8	119.4
Total equity	334.5	345.9
Total liabilities and equity	1,002.0	1,031.9
Eliminations
Assets
Receivables, net of allowance for doubtful accounts	(133.9)	(165.7)
Prepaid expenses and other	(0.2)
Deferred income taxes	(2.7)	(2.7)
Total current assets	(136.8)	(168.4)
Long-term receivables - affiliates	(1,312.3)	(1,328.6)
Investments in subsidiaries	(2,066.8)	(2,060.6)
Total assets	(3,515.9)	(3,557.6)
Liabilities and Equity:
Accounts payable	(133.9)	(165.7)
Income taxes payable	(0.2)
Other accrued current liabilities	(2.7)	(2.7)
Total current liabilities	(136.8)	(168.4)
Long-term payables - affiliates	(1,312.3)	(1,328.6)
Other non-current liabilities	(91.5)	(86.7)
Total liabilities	(1,540.6)	(1,583.7)
Equity:
Total Axiall stockholders' equity	(1,975.3)	(1,973.9)
Total equity	(1,975.3)	(1,973.9)
Total liabilities and equity	$ (3,515.9)	$ (3,557.6)