v3.5.0.2
Guarantor Information - Guarantor Condensed Consolidating Statement of Operations and Comprehensive Income (Loss) Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Condensed Income Statements, Captions [Line Items]        
Net sales $ 776.1 $ 869.2 $ 1,475.3 $ 1,653.8
Operating costs and expenses:        
Cost of sales 705.5 745.7 1,324.5 1,426.4
Selling, general and administrative expenses 69.8 75.8 139.9 151.8
Restructuring and divestiture costs 4.5 0.4 41.2 1.1
Integration-related costs and other, net 2.1 4.2 5.5 9.3
Legal and settlement claims, net 23.4   23.4  
Fees associated with unsolicited offer and strategic alternatives 8.4   13.6  
Total operating costs and expenses 813.7 826.1 1,548.1 1,588.6
Operating income (loss) (37.6) 43.1 (72.8) 65.2
Other income (expense):        
Interest income (expense), net (18.0) (18.3) (35.0) (35.9)
Debt refinancing costs       (3.2)
Foreign currency exchange gain (loss) (0.1) (0.1) (1.0) (0.8)
Income (loss) from continuing operations before income taxes (55.7) 24.7 (108.8) 25.3
Benefit from income taxes (28.4) 1.9 (51.2) 4.9
Income (loss) from continuing operations (27.3) 22.8 (57.6) 20.4
Discontinued operations:        
Loss from discontinued operations (1.7) (1.7) (33.1) (8.9)
Less: Benefit from income taxes of discontinued operations (1.7) (0.8) (10.1) (1.6)
Net income (loss) from discontinued operations   (0.9) (23.0) (7.3)
Consolidated net income (loss) (27.3) 21.9 (80.6) 13.1
Less: net income attributable to noncontrolling interest 0.5 1.3 0.8 3.1
Net income (loss) attributable to Axiall (27.8) 20.6 (81.4) 10.0
Comprehensive income (loss) attributable to Axiall (28.2) 29.0 (59.9) (9.4)
Eliminations [Member]        
Condensed Income Statements, Captions [Line Items]        
Net sales (31.5) (55.6) (71.8) (103.8)
Operating costs and expenses:        
Cost of sales (31.5) (55.6) (71.8) (103.8)
Total operating costs and expenses (31.5) (55.6) (71.8) (103.8)
Other income (expense):        
Equity in income (loss) of subsidiaries (0.4) (47.7) 67.1 (40.3)
Income (loss) from continuing operations before income taxes (0.4) (47.7) 67.1 (40.3)
Income (loss) from continuing operations (0.4) (47.7) 67.1 (40.3)
Discontinued operations:        
Consolidated net income (loss) (0.4) (47.7) 67.1 (40.3)
Net income (loss) attributable to Axiall (0.4) (47.7) 67.1 (40.3)
Comprehensive income (loss) attributable to Axiall   (66.0) 18.9 18.4
Parent Company [Member] | Reportable Legal Entities [Member]        
Operating costs and expenses:        
Selling, general and administrative expenses 14.4 13.9 27.3 26.3
Restructuring and divestiture costs 2.0 0.5 7.5 1.1
Integration-related costs and other, net 0.4 2.0 0.9 5.4
Fees associated with unsolicited offer and strategic alternatives 8.4   13.6  
Total operating costs and expenses 25.2 16.4 49.3 32.8
Operating income (loss) (25.2) (16.4) (49.3) (32.8)
Other income (expense):        
Interest income (expense), net 4.7 4.5 9.4 10.5
Foreign currency exchange gain (loss)       (0.1)
Equity in income (loss) of subsidiaries (16.8) 32.5 (61.8) 29.6
Income (loss) from continuing operations before income taxes (37.3) 20.6 (101.7) 7.2
Benefit from income taxes (9.5)   (20.3) (2.8)
Income (loss) from continuing operations (27.8) 20.6 (81.4) 10.0
Discontinued operations:        
Consolidated net income (loss) (27.8) 20.6 (81.4) 10.0
Net income (loss) attributable to Axiall (27.8) 20.6 (81.4) 10.0
Comprehensive income (loss) attributable to Axiall (28.2) 29.0 (59.9) (9.4)
Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Other income (expense):        
Interest income (expense), net (19.8) (19.8) (39.6) (40.7)
Debt refinancing costs       (0.1)
Foreign currency exchange gain (loss)       0.1
Equity in income (loss) of subsidiaries (22.0) (5.2) (32.4) (12.1)
Income (loss) from continuing operations before income taxes (41.8) (25.0) (72.0) (52.8)
Benefit from income taxes (9.1) 0.4 (20.1) (5.2)
Income (loss) from continuing operations (32.7) (25.4) (51.9) (47.6)
Discontinued operations:        
Consolidated net income (loss) (32.7) (25.4) (51.9) (47.6)
Net income (loss) attributable to Axiall (32.7) (25.4) (51.9) (47.6)
Comprehensive income (loss) attributable to Axiall (34.6) (15.7) (49.3) (22.6)
Guarantor Subsidiaries Excluding Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Net sales 670.7 756.9 1,298.0 1,469.7
Operating costs and expenses:        
Cost of sales 630.2 670.1 1,197.9 1,296.5
Selling, general and administrative expenses 42.9 44.3 87.2 91.4
Restructuring and divestiture costs 1.8 (0.1) 11.3 (0.1)
Integration-related costs and other, net 1.7 2.2 4.6 3.3
Legal and settlement claims, net 23.4   23.4  
Total operating costs and expenses 700.0 716.5 1,324.4 1,391.1
Operating income (loss) (29.3) 40.4 (26.4) 78.6
Other income (expense):        
Interest income (expense), net (1.9) (1.9) (2.9) (1.9)
Debt refinancing costs       (3.1)
Foreign currency exchange gain (loss) (0.1)   (0.1) (0.1)
Equity in income (loss) of subsidiaries 17.2 15.2 (5.3) 10.7
Income (loss) from continuing operations before income taxes (14.1) 53.7 (34.7) 84.2
Benefit from income taxes (7.9) 1.4 (10.0) 11.9
Income (loss) from continuing operations (6.2) 52.3 (24.7) 72.3
Discontinued operations:        
Loss from discontinued operations (1.6) (0.4) (27.8) (2.9)
Less: Benefit from income taxes of discontinued operations (1.7) (0.8) (10.1) (1.6)
Net income (loss) from discontinued operations 0.1 0.4 (17.7) (1.3)
Consolidated net income (loss) (6.1) 52.7 (42.4) 71.0
Net income (loss) attributable to Axiall (6.1) 52.7 (42.4) 71.0
Comprehensive income (loss) attributable to Axiall (6.6) 61.1 (21.0) 49.1
Guarantor Subsidiaries Including Eagle Spinco Inc [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Net sales 670.7 756.9 1,298.0 1,469.7
Operating costs and expenses:        
Cost of sales 630.2 670.1 1,197.9 1,296.5
Selling, general and administrative expenses 42.9 44.3 87.2 91.4
Restructuring and divestiture costs 1.8 (0.1) 11.3 (0.1)
Integration-related costs and other, net 1.7 2.2 4.6 3.3
Legal and settlement claims, net 23.4   23.4  
Total operating costs and expenses 700.0 716.5 1,324.4 1,391.1
Operating income (loss) (29.3) 40.4 (26.4) 78.6
Other income (expense):        
Interest income (expense), net (21.7) (21.7) (42.5) (42.6)
Debt refinancing costs       (3.2)
Foreign currency exchange gain (loss) (0.1)   (0.1) (0.1)
Equity in income (loss) of subsidiaries 17.2 15.2 (5.3) 10.7
Income (loss) from continuing operations before income taxes (33.9) 33.9 (74.3) 43.4
Benefit from income taxes (17.0) 1.8 (30.1) 6.7
Income (loss) from continuing operations (16.9) 32.1 (44.2) 36.7
Discontinued operations:        
Loss from discontinued operations (1.6) (0.4) (27.8) (2.9)
Less: Benefit from income taxes of discontinued operations (1.7) (0.8) (10.1) (1.6)
Net income (loss) from discontinued operations 0.1 0.4 (17.7) (1.3)
Consolidated net income (loss) (16.8) 32.5 (61.9) 35.4
Net income (loss) attributable to Axiall (16.8) 32.5 (61.9) 35.4
Comprehensive income (loss) attributable to Axiall (17.3) 40.9 (40.5) 13.5
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Net sales 136.9 167.9 249.1 287.9
Operating costs and expenses:        
Cost of sales 106.8 131.2 198.4 233.7
Selling, general and administrative expenses 12.5 17.6 25.4 34.1
Restructuring and divestiture costs 0.7   22.4 0.1
Integration-related costs and other, net       0.6
Total operating costs and expenses 120.0 148.8 246.2 268.5
Operating income (loss) 16.9 19.1 2.9 19.4
Other income (expense):        
Interest income (expense), net (1.0) (1.1) (1.9) (3.8)
Foreign currency exchange gain (loss)   (0.1) (0.9) (0.6)
Income (loss) from continuing operations before income taxes 15.9 17.9 0.1 15.0
Benefit from income taxes (1.9) 0.1 (0.8) 1.0
Income (loss) from continuing operations 17.8 17.8 0.9 14.0
Discontinued operations:        
Loss from discontinued operations (0.1) (1.3) (5.3) (6.0)
Net income (loss) from discontinued operations (0.1) (1.3) (5.3) (6.0)
Consolidated net income (loss) 17.7 16.5 (4.4) 8.0
Less: net income attributable to noncontrolling interest 0.5 1.3 0.8 3.1
Net income (loss) attributable to Axiall 17.2 15.2 (5.2) 4.9
Comprehensive income (loss) attributable to Axiall $ 17.3 $ 25.1 $ 21.6 $ (31.9)