SUPPLEMENTAL GUARANTOR INFORMATION (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Supplemental Condensed Consolidating Balance Sheet Information
Ownership interest (as a percent)	100.00%
Assets
Cash and cash equivalents	$ 166.5	$ 200.3	$ 88.6	$ 122.8
Receivables, net of allowance for doubtful accounts	548.8	314.9
Inventories	403.6	288.4
Prepaid expenses and other	31.6	14.7
Deferred income taxes	18.0	21.1
Total current assets	1,168.5	839.4
Property, plant and equipment, net	1,658.7	637.7
Goodwill	1,763.2	217.2
Customer relationships, net	1,101.8	26.5
Other intangible assets, net	72.9	16.9
Other assets, net	112.1	63.6
Total assets	5,877.2	1,801.3	1,644.2
Liabilities and Equity:
Current portion of long-term debt	2.8
Accounts payable	313.7	211.2
Interest payable	15.4	18.9
Income taxes payable	17.1	15.1
Accrued compensation	61.5	44.7
Other accrued current liabilities	132.6	61.2
Total current liabilities	543.1	351.1
Long-term debt, excluding the current portion of long-term debt	1,330.0	448.1
Lease financing obligation	104.7	112.3
Deferred income taxes	865.5	177.9
Pensions and other postretirement benefits	129.8	52.3
Other non-current liabilities	175.8	56.1
Total liabilities	3,148.9	1,197.8
Equity:
Total Axiall stockholders' equity	2,608.9	603.5
Noncontrolling interest	119.4
Total equity	2,728.3	603.5	488.5	444.6
Total liabilities and equity	5,877.2	1,801.3
4.875 Notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)	4.875%
9 percent notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)		9.00%	9.00%
Splitco and Guarantor Subsidiaries
Supplemental Condensed Consolidating Balance Sheet Information
Ownership interest (as a percent)	100.00%
Eagle Spinco | Splitco Notes
Supplemental Condensed Consolidating Balance Sheet Information
Interest rate (as a percent)	4.625%
Reportable legal entity | Parent Company
Assets
Receivables, net of allowance for doubtful accounts	162.5	2.2
Prepaid expenses and other	1.3
Deferred income taxes		7.9
Total current assets	163.8	10.1
Property, plant and equipment, net	9.8	1.5
Long-term receivables - affiliates	1,328.6	458.0
Other assets, net	12.2	14.0
Investments in subsidiaries	1,747.7	1,446.5
Total assets	3,262.1	1,930.1
Liabilities and Equity:
Accounts payable	16.8	745.1
Interest payable	3.1	18.9
Accrued compensation	0.5
Other accrued current liabilities	129.0	1.0
Total current liabilities	33.3	765.0
Long-term debt, excluding the current portion of long-term debt	450.0	448.1
Deferred income taxes	31.0	16.9
Pensions and other postretirement benefits	13.7
Other non-current liabilities	125.2	96.6
Total liabilities	653.2	1,326.6
Equity:
Total Axiall stockholders' equity	2,608.9	603.5
Total equity	2,608.9	603.5
Total liabilities and equity	3,262.1	1,930.1
Reportable legal entity | Eagle Spinco | 4.625 Notes, 4.875 Notes and Term Loan Credit Agreement
Assets
Other assets, net	13.2
Investments in subsidiaries	2,950.8
Total assets	2,964.0
Liabilities and Equity:
Current portion of long-term debt	2.8
Accounts payable	119.6
Interest payable	12.3
Total current liabilities	134.7
Long-term debt, excluding the current portion of long-term debt	880.0
Long-term payables - affiliates	900.0
Total liabilities	1,914.7
Equity:
Total Axiall stockholders' equity	1,049.3
Total equity	1,049.3
Total liabilities and equity	2,964.0
Reportable legal entity | Subsidiary Guarantors Excluding Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan Credit Agreement
Assets
Cash and cash equivalents	76.9	131.4	43.4
Receivables, net of allowance for doubtful accounts	482.2
Inventories	310.5
Prepaid expenses and other	26.1
Deferred income taxes	20.5
Total current assets	916.2
Property, plant and equipment, net	1,325.6
Goodwill	1,496.6
Customer relationships, net	935.2
Other intangible assets, net	72.9
Other assets, net	71.7
Investments in subsidiaries	312.9
Total assets	5,131.1
Liabilities and Equity:
Accounts payable	319.6
Income taxes payable	12.2
Accrued compensation	49.6
Other accrued current liabilities	86.5
Total current liabilities	467.9
Deferred income taxes	790.9
Pensions and other postretirement benefits	107.0
Other non-current liabilities	116.4
Total liabilities	1,482.2
Equity:
Total Axiall stockholders' equity	3,648.9
Total equity	3,648.9
Total liabilities and equity	5,131.1
Reportable legal entity | Subsidiary Guarantors Excluding Eagle Spinco Inc | 9 percent notes
Assets
Cash and cash equivalents		131.4	(50.2)	93.7
Receivables, net of allowance for doubtful accounts		988.7
Inventories		201.6
Prepaid expenses and other		11.9
Deferred income taxes		13.0
Total current assets		1,346.6
Property, plant and equipment, net		422.0
Long-term receivables - affiliates		9.4
Goodwill		105.0
Customer relationships, net		26.5
Other intangible assets, net		14.4
Other assets, net		38.8
Total assets		1,962.7
Liabilities and Equity:
Accounts payable		176.3
Income taxes payable		13.9
Accrued compensation		29.4
Other accrued current liabilities		38.5
Total current liabilities		258.1
Deferred income taxes		161.0
Pensions and other postretirement benefits		52.3
Other non-current liabilities		44.7
Total liabilities		516.1
Equity:
Total Axiall stockholders' equity		1,446.6
Total equity		1,446.6
Total liabilities and equity		1,962.7
Reportable legal entity | Subsidiary Guarantors Including Eagle Spinco Inc | 4.625 Notes, 4.875 Notes and Term Loan Credit Agreement
Assets
Cash and cash equivalents	76.9	131.0
Receivables, net of allowance for doubtful accounts	478.7
Inventories	310.5
Prepaid expenses and other	26.1
Deferred income taxes	20.5
Total current assets	912.7
Property, plant and equipment, net	1,325.6
Goodwill	1,496.6
Customer relationships, net	935.2
Other intangible assets, net	72.9
Other assets, net	84.9
Investments in subsidiaries	312.9
Total assets	5,140.8
Liabilities and Equity:
Current portion of long-term debt	2.8
Accounts payable	435.7
Interest payable	12.3
Income taxes payable	12.2
Accrued compensation	49.6
Other accrued current liabilities	86.5
Total current liabilities	599.1
Long-term debt, excluding the current portion of long-term debt	880.0
Long-term payables - affiliates	900.0
Deferred income taxes	790.9
Pensions and other postretirement benefits	107.0
Other non-current liabilities	116.4
Total liabilities	3,393.4
Equity:
Total Axiall stockholders' equity	1,747.4
Total equity	1,747.4
Total liabilities and equity	5,140.8
Reportable legal entity | Subsidiary Guarantors Including Eagle Spinco Inc | 9 percent notes
Assets
Cash and cash equivalents		131.4	43.5	93.7
Receivables, net of allowance for doubtful accounts		988.7
Inventories		201.6
Prepaid expenses and other		11.9
Deferred income taxes		13.0
Total current assets		1,346.6
Property, plant and equipment, net		422.0
Long-term receivables - affiliates		9.4
Goodwill		105.0
Customer relationships, net		26.5
Other intangible assets, net		14.4
Other assets, net		38.8
Total assets		1,962.7
Liabilities and Equity:
Accounts payable		176.3
Income taxes payable		13.9
Accrued compensation		29.4
Other accrued current liabilities		38.5
Total current liabilities		258.1
Deferred income taxes		161.0
Pensions and other postretirement benefits		52.3
Other non-current liabilities		44.7
Total liabilities		516.1
Equity:
Total Axiall stockholders' equity		1,446.6
Total equity		1,446.6
Total liabilities and equity		1,962.7
Reportable legal entity | Non-Guarantor Subsidiaries | 4.625 Notes, 4.875 Notes and Term Loan Credit Agreement
Assets
Cash and cash equivalents	89.6	68.9
Receivables, net of allowance for doubtful accounts	73.3
Inventories	93.1
Prepaid expenses and other	4.2
Deferred income taxes	0.2
Total current assets	260.4
Property, plant and equipment, net	323.3
Goodwill	266.6
Customer relationships, net	166.6
Other assets, net	15.0
Total assets	1,031.9
Liabilities and Equity:
Accounts payable	26.9
Income taxes payable	4.9
Accrued compensation	11.4
Other accrued current liabilities	35.9
Total current liabilities	79.1
Long-term payables - affiliates	428.6
Lease financing obligation	104.7
Deferred income taxes	43.6
Pensions and other postretirement benefits	9.1
Other non-current liabilities	20.9
Total liabilities	686.0
Equity:
Total Axiall stockholders' equity	226.5
Noncontrolling interest	119.4
Total equity	345.9
Total liabilities and equity	1,031.9
Reportable legal entity | Non-Guarantor Subsidiaries | 9 percent notes
Assets
Cash and cash equivalents		68.9	45.1	29.1
Receivables, net of allowance for doubtful accounts		55.7
Inventories		86.8
Prepaid expenses and other		2.8
Deferred income taxes		0.2
Total current assets		214.4
Property, plant and equipment, net		214.2
Goodwill		112.2
Other intangible assets, net		2.5
Other assets, net		10.8
Total assets		554.1
Liabilities and Equity:
Accounts payable		21.5
Income taxes payable		1.2
Accrued compensation		15.3
Other accrued current liabilities		21.7
Total current liabilities		59.7
Long-term payables - affiliates		467.4
Lease financing obligation		112.3
Other non-current liabilities		19.6
Total liabilities		659.0
Equity:
Total Axiall stockholders' equity		(104.9)
Total equity		(104.9)
Total liabilities and equity		554.1
Eliminations
Assets
Receivables, net of allowance for doubtful accounts	(165.7)	(731.7)
Deferred income taxes	(2.7)
Total current assets	(168.4)	(731.7)
Long-term receivables - affiliates	(1,328.6)	(467.4)
Investments in subsidiaries	(2,060.6)	(1,446.5)
Total assets	(3,557.6)	(2,645.6)
Liabilities and Equity:
Accounts payable	(165.7)	(731.7)
Other accrued current liabilities	(2.7)
Total current liabilities	(168.4)	(731.7)
Long-term payables - affiliates	(1,328.6)	(467.4)
Other non-current liabilities	(86.7)	(104.8)
Total liabilities	(1,583.7)	(1,303.9)
Equity:
Total Axiall stockholders' equity	(1,973.9)	(1,341.7)
Total equity	(1,973.9)	(1,341.7)
Total liabilities and equity	$ (3,557.6)	$ (2,645.6)