v3.5.0.2
Guarantor Information - Guarantor Condensed Consolidating Balance Sheet Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Assets:        
Cash and cash equivalents $ 258.0 $ 166.8 $ 166.5 $ 200.3
Receivables, net of allowance for doubtful accounts 355.3 419.2    
Inventories 280.9 298.0    
Prepaid expenses and other 58.9 89.0    
Deferred income taxes   28.0    
Current assets of discontinued operations 36.9 104.2    
Total current assets 990.0 1,105.2    
Property, plant and equipment, net 1,556.5 1,562.4    
Goodwill 852.1 1,741.0    
Customer relationships, net 950.3 1,024.5    
Other intangible assets, net 63.4 68.1    
Non-current assets of discontinued operations 62.0 107.4    
Other assets, net 65.1 47.4    
Total assets 4,539.4 5,656.0 5,857.1  
Liabilities and Equity:        
Current portion of long-term debt 2.5 2.8    
Accounts payable 244.8 261.3    
Interest payable 15.4 15.2    
Income taxes payable 2.2 3.1    
Accrued compensation 41.0 30.7    
Other accrued liabilities 94.7 129.4    
Current liabilities of discontinued operations 15.5 41.6    
Total current liabilities 416.1 484.1    
Long-term debt, excluding the current portion of long-term debt 1,364.5 1,309.5    
Lease financing obligation 44.0 53.0    
Deferred income taxes 683.0 767.5    
Pension and other post-retirement benefits 202.8 250.5    
Non-current liabilities of discontinued operations 35.6 45.3    
Other non-current liabilities 140.3 157.1    
Total liabilities 2,886.3 3,067.0    
Equity:        
Total Axiall stockholders' equity 1,578.3 2,481.1    
Noncontrolling interest 74.8 107.9    
Total equity 1,653.1 2,589.0 2,728.3 603.5
Total liabilities and equity 4,539.4 5,656.0    
Eliminations [Member]        
Assets:        
Receivables, net of allowance for doubtful accounts (97.5) (261.1)    
Prepaid expenses and other (0.4)      
Total current assets (97.9) (261.1)    
Long-term receivables-affiliates (900.0) (1,292.9)    
Investment in subsidiaries (1,708.8) (1,973.2)    
Total assets (2,706.7) (3,527.2)    
Liabilities and Equity:        
Accounts payable (97.5) (261.1)    
Income taxes payable (0.4)      
Total current liabilities (97.9) (261.1)    
Long-term payables-affiliates (900.0) (1,292.9)    
Other non-current liabilities (7.3) (77.1)    
Total liabilities (1,005.2) (1,631.1)    
Equity:        
Total Axiall stockholders' equity (1,701.5) (1,896.1)    
Total equity (1,701.5) (1,896.1)    
Total liabilities and equity (2,706.7) (3,527.2)    
Parent Company [Member] | Reportable Legal Entities [Member]        
Assets:        
Cash and cash equivalents 0.3      
Receivables, net of allowance for doubtful accounts 27.1 162.8    
Prepaid expenses and other 0.7 0.1    
Deferred income taxes   3.1    
Total current assets 28.1 166.0    
Property, plant and equipment, net 11.0 12.0    
Long-term receivables-affiliates 900.0 1,292.9    
Other assets, net 5.6 10.4    
Investment in subsidiaries 1,235.5 1,682.7    
Total assets 2,180.2 3,164.0    
Liabilities and Equity:        
Accounts payable 84.3 97.2    
Interest payable 3.2 3.0    
Accrued compensation 9.5      
Other accrued liabilities 13.6 14.3    
Total current liabilities 110.6 114.5    
Long-term debt, excluding the current portion of long-term debt 444.2 443.4    
Deferred income taxes 18.0 10.0    
Pension and other post-retirement benefits 3.6 4.4    
Other non-current liabilities 25.5 110.6    
Total liabilities 601.9 682.9    
Equity:        
Total Axiall stockholders' equity 1,578.3 2,481.1    
Total equity 1,578.3 2,481.1    
Total liabilities and equity 2,180.2 3,164.0    
Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Assets:        
Receivables, net of allowance for doubtful accounts 5.5      
Total current assets 5.5      
Other assets, net 1.7 0.7    
Investment in subsidiaries 1,833.3 2,831.2    
Total assets 1,840.5 2,831.9    
Liabilities and Equity:        
Current portion of long-term debt   2.8    
Accounts payable 27.0 178.6    
Interest payable 12.2 12.2    
Total current liabilities 39.2 193.6    
Long-term debt, excluding the current portion of long-term debt 678.4 866.1    
Long-term payables-affiliates 900.0 900.0    
Total liabilities 1,617.6 1,959.7    
Equity:        
Total Axiall stockholders' equity 222.9 872.2    
Total equity 222.9 872.2    
Total liabilities and equity 1,840.5 2,831.9    
Guarantor Subsidiaries Excluding Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Assets:        
Cash and cash equivalents 159.4 78.2 76.9 131.4
Receivables, net of allowance for doubtful accounts 377.4 470.1    
Inventories 217.7 216.4    
Prepaid expenses and other 55.9 82.8    
Deferred income taxes   24.9    
Current assets of discontinued operations 19.3 80.4    
Total current assets 829.7 952.8    
Property, plant and equipment, net 1,357.9 1,318.4    
Goodwill 707.8 1,493.7    
Customer relationships, net 823.1 877.9    
Other intangible assets, net 63.1 67.8    
Non-current assets of discontinued operations 18.4 49.3    
Other assets, net 56.1 31.6    
Investment in subsidiaries 473.3 290.5    
Total assets 4,329.4 5,082.0    
Liabilities and Equity:        
Current portion of long-term debt 2.5      
Accounts payable 211.9 217.9    
Income taxes payable 0.4 0.9    
Accrued compensation 23.7 24.5    
Other accrued liabilities 48.2 88.7    
Current liabilities of discontinued operations 9.3 34.2    
Total current liabilities 296.0 366.2    
Long-term debt, excluding the current portion of long-term debt 241.9      
Deferred income taxes 636.2 720.4    
Pension and other post-retirement benefits 189.9 235.7    
Non-current liabilities of discontinued operations   3.8    
Other non-current liabilities 113.2 114.9    
Total liabilities 1,477.2 1,441.0    
Equity:        
Total Axiall stockholders' equity 2,852.2 3,641.0    
Total equity 2,852.2 3,641.0    
Total liabilities and equity 4,329.4 5,082.0    
Guarantor Subsidiaries Including Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Assets:        
Cash and cash equivalents 159.4 78.2 76.9 131.4
Receivables, net of allowance for doubtful accounts 377.4 454.3    
Inventories 217.7 216.4    
Prepaid expenses and other 55.9 82.8    
Deferred income taxes   24.9    
Current assets of discontinued operations 19.3 80.4    
Total current assets 829.7 937.0    
Property, plant and equipment, net 1,357.9 1,318.4    
Goodwill 707.8 1,493.7    
Customer relationships, net 823.1 877.9    
Other intangible assets, net 63.1 67.8    
Non-current assets of discontinued operations 18.4 49.3    
Other assets, net 56.1 31.6    
Investment in subsidiaries 473.3 290.5    
Total assets 4,329.4 5,066.2    
Liabilities and Equity:        
Current portion of long-term debt 2.5 2.8    
Accounts payable 233.3 380.6    
Interest payable 12.2 12.2    
Income taxes payable 0.4 0.9    
Accrued compensation 23.7 24.5    
Other accrued liabilities 48.2 88.7    
Current liabilities of discontinued operations 9.3 34.2    
Total current liabilities 329.6 543.9    
Long-term debt, excluding the current portion of long-term debt 920.3 866.1    
Long-term payables-affiliates 900.0 900.0    
Deferred income taxes 634.5 719.8    
Pension and other post-retirement benefits 189.9 235.7    
Non-current liabilities of discontinued operations   3.8    
Other non-current liabilities 113.2 114.9    
Total liabilities 3,087.5 3,384.2    
Equity:        
Total Axiall stockholders' equity 1,241.9 1,682.0    
Total equity 1,241.9 1,682.0    
Total liabilities and equity 4,329.4 5,066.2    
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]        
Assets:        
Cash and cash equivalents 98.3 88.6 $ 89.6 $ 68.9
Receivables, net of allowance for doubtful accounts 48.3 63.2    
Inventories 63.2 81.6    
Prepaid expenses and other 2.7 6.1    
Current assets of discontinued operations 17.6 23.8    
Total current assets 230.1 263.3    
Property, plant and equipment, net 187.6 232.0    
Goodwill 144.3 247.3    
Customer relationships, net 127.2 146.6    
Other intangible assets, net 0.3 0.3    
Non-current assets of discontinued operations 43.6 58.1    
Other assets, net 3.4 5.4    
Total assets 736.5 953.0    
Liabilities and Equity:        
Accounts payable 24.7 44.6    
Income taxes payable 2.2 2.2    
Accrued compensation 7.8 6.2    
Other accrued liabilities 32.9 26.4    
Current liabilities of discontinued operations 6.2 7.4    
Total current liabilities 73.8 86.8    
Long-term payables-affiliates   392.9    
Lease financing obligation 44.0 53.0    
Deferred income taxes 30.5 37.7    
Pension and other post-retirement benefits 9.3 10.4    
Non-current liabilities of discontinued operations 35.6 41.5    
Other non-current liabilities 8.9 8.7    
Total liabilities 202.1 631.0    
Equity:        
Total Axiall stockholders' equity 459.6 214.1    
Noncontrolling interest 74.8 107.9    
Total equity 534.4 322.0    
Total liabilities and equity $ 736.5 $ 953.0