Consolidated Statements of Stockholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Total Axiall Shareholders' Equity	Common Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Balance at Dec. 31, 2010	$ 444.6	$ 444.6	$ 0.3	$ 476.3	$ (31.8)	$ (0.2)
Balance (in shares) at Dec. 31, 2010			34,000,000
Increase (Decrease) in Shareholders' Equity
Consolidated net income	57.7	57.7			57.7
Other comprehensive income (loss)	(18.0)	(18.0)				(18.0)
Employee stock purchase and stock compensation plans, net of forfeitures	6.7	6.7		6.7
Employee stock purchase and stock compensation plans, net of forfeitures (in shares)			400,000
Shares withheld for taxes on share-based payment awards	(2.6)	(2.6)		(2.6)
Shares withheld for taxes on share-based payment awards (in shares)			(100,000)
Tax benefit from stock purchase and stock compensation plans	0.1	0.1		0.1
Balance at Dec. 31, 2011	488.5	488.5	0.3	480.5	25.9	(18.2)
Balance (in shares) at Dec. 31, 2011			34,300,000
Increase (Decrease) in Shareholders' Equity
Consolidated net income	120.5	120.5			120.5
Dividends declared ($0.48 and $0.24 per share for the year ended December 31, 2013 and December 31, 2012, respectively)	(8.4)	(8.4)			(8.4)
Other comprehensive income (loss)	(3.7)	(3.7)				(3.7)
Employee stock purchase and stock compensation plans, net of forfeitures	9.1	9.1		9.1
Employee stock purchase and stock compensation plans, net of forfeitures (in shares)			500,000
Shares withheld for taxes on share-based payment awards	(5.3)	(5.3)		(5.3)
Shares withheld for taxes on share-based payment awards (in shares)			(200,000)
Tax benefit from stock purchase and stock compensation plans	2.8	2.8		2.8
Balance at Dec. 31, 2012	603.5	603.5	0.3	487.1	138.0	(21.9)
Balance (in shares) at Dec. 31, 2012			34,600,000
Increase (Decrease) in Shareholders' Equity
Consolidated net income	168.0	165.3			165.3		2.7
Dividends declared ($0.48 and $0.24 per share for the year ended December 31, 2013 and December 31, 2012, respectively)	(34.0)	(34.0)			(34.0)
Distribution to noncontrolling interest	(13.3)						(13.3)
Other comprehensive income (loss)	88.2	88.2				88.2
Issuance of common stock and replacement share-based awards in connection with merger	1,775.3	1,775.3	0.4	1,774.9
Issuance of common stock and replacement share-based awards in connection with merger (in shares)			35,200,000
Noncontrolling interest recognized in connection with the merger	130.0						130.0
Employee stock purchase and stock compensation plans, net of forfeitures	11.6	11.6		11.6
Employee stock purchase and stock compensation plans, net of forfeitures (in shares)			100,000
Shares withheld for taxes on share-based payment awards	(1.7)	(1.7)		(1.7)
Tax benefit from stock purchase and stock compensation plans	0.7	0.7		0.7
Balance at Dec. 31, 2013	$ 2,728.3	$ 2,608.9	$ 0.7	$ 2,272.6	$ 269.3	$ 66.3	$ 119.4
Balance (in shares) at Dec. 31, 2013			69,900,000