v3.5.0.2

Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 715.7 | $ 827.5 | $ 869.2 | $ 784.6 | $ 861.6 | $ 997.5 | $ 974.9 | $ 808.5 | $ 3,197.0 | $ 3,642.5 | $ 3,585.1
Gross margin | 36.1 | 112.8 | 123.5 | 103.9 | 123.2 | 156.7 | 149.6 | 76.8 |  |  |
Operating income (loss) | (61.4) | (811.7) | 43.1 | 22.1 | 19.6 | 75.1 | 68.9 | 3.1 | (807.9) | 166.7 | 385.7
Net income (loss) from continuing operations | (66.0) | (798.2) | 22.8 | (2.4) | (0.2) | 48.2 | 37.7 | (7.7) | (843.8) | 78.0 | 192.2
Consolidated net income (loss) | (57.7) | (792.5) | 21.9 | (8.8) | (12.4) | 45.1 | 28.1 | (10.6) | (837.1) | 50.2 | 168.0
Net income (loss) attributable to Axiall | $ (56.8) | $ (769.6) | $ 20.6 | $ (10.6) | $ (13.8) | $ 44.5 | $ 27.2 | $ (11.6) | $ (816.4) | $ 46.3 | $ 165.3
Earnings (loss) per share: |  |  |  |  |  |  |  |  |  |  |
Basic | $ (0.80) | $ (10.90) | $ 0.29 | $ (0.15) | $ (0.20) | $ 0.64 | $ 0.39 | $ (0.17) | $ (11.59) | $ 0.66 | $ 2.46
Diluted | $ (0.80) | $ (10.90) | $ 0.29 | $ (0.15) | $ (0.20) | $ 0.63 | $ 0.38 | $ (0.17) | $ (11.59) | $ 0.65 | $ 2.44

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