Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Data

The following table sets forth certain quarterly financial data. The quarterly earnings (loss) per share amounts for a year will not add to the earnings per share for that year due to weighting of shares used in calculating per share data.

	Quarter and Year Ended December 31, 2015
(In millions, except per share data)	Q1		Q2		Q3		Q4
Net sales	$	814.8	$	916.5	$	874.4	$	755.4
Gross margin		101.8		127.3		117.5		45.6
Operating income (loss)		15.4		42.4		(811.3)		(57.4)
Net income (loss) from continuing operations		(9.0)		20.8		(797.5)		(63.4)
Consolidated net income (loss)		(8.8)		21.9		(792.5)		(57.7)
Net income (loss) attributable to Axiall		(10.6)		20.6		(769.6)		(56.8)
Earnings (loss) per share:
Basic	$	(0.15)	$	0.29	$	(10.90)	$	(0.80)
Diluted	$	(0.15)	$	0.29	$	(10.90)	$	(0.80)
	Quarter and Year Ended December 31, 2014
	Q1		Q2		Q3		Q4
Net sales	$	836.9	$	1,021.7	$	1,047.2	$	903.0
Gross margin		74.6		153.0		158.8		130.1
Operating income (loss)		(4.9)		65.8		72.2		21.7
Net income (loss) from continuing operations		(13.8)		33.5		43.5		0.9
Consolidated net income (loss)		(10.6)		28.1		45.1		(12.4)
Net income (loss) attributable to Axiall		(11.6)		27.2		44.5		(13.8)
Earnings (loss) per share:
Basic	$	(0.17)	$	0.39	$	0.64	$	(0.20)
Diluted	$	(0.17)	$	0.38	$	0.63	$	(0.20)