CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Non-Founder Director	Preferred Stock	Common Stock	Common Stock Non-Founder Director	Common Stock Non-employee	Additional Paid-in Capital	Additional Paid-in Capital Non-Founder Director	Treasury Stock	Accumulated Deficit	Accumulated other Comprehensive (Loss) Income	Total Stockholders' Equity	Total Stockholders' Equity Non-Founder Director	Non- controlling Interest
Balance (in shares) at Dec. 31, 2014			2,000,000	182,066,980					0
Balance at Dec. 31, 2014	$ 2,552.6		$ 0.0	$ 1.9			$ 2,812.4		$ 0.0	$ (224.1)	$ (130.6)	$ 2,459.6		$ 93.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(304.4)									(308.6)		(308.6)		4.2
Other comprehensive income (loss)	(795.5)										(755.5)	(755.5)		(40.0)
Issuance of common stock to Founder Entities as stock dividend to Series A Preferred Stock declared on December 31, 2014 (in shares)				10,050,290
Issuance of common stock (in shares)					75,000	2,500
Issuance of common stock to former non-founder director for exercise of stock options		$ 0.9						$ 0.9					$ 0.9
Conversion of PDH Common Stock into common stock (in shares)				578,874
Conversion of PDH Common Stock into common stock	0.0						6.6					6.6		(6.6)
Issuance of common stock under ESPP (in shares)				44,361
Issuance of common stock under ESPP	0.7						0.7					0.7
Equity compensation expense	0.9						0.9					0.9
Acquisition of non-controlling interest with Arysta Acquisition	125.4													125.4
Issuance of common stock at in equity offering (in shares)				18,226,414
Issuance of common stock in equity offering	482.9			$ 0.2			482.7					482.9
Issuance costs in connection with equity offering	(15.0)						(15.0)					(15.0)
Acquisition of remaining interest in Arysta Colombia	(3.3)													(3.3)
Issuance of common shares at $12.56 per share in connection with Alent acquisition on December 1, 2015 (in shares)				18,419,738
Issuance of common shares at $12.56 per share in connection with Alent acquisition on December 1, 2015	231.4			$ 0.2			231.2					231.4
Sale of 50.65% ownership in Arysta Toyo Green Co LTD, including maintenance subsidiary	(1.7)													(1.7)
Changes in non-controlling interests	(1.6)													(1.6)
Balance (in shares) at Dec. 31, 2015			2,000,000	229,464,157					0
Balance at Dec. 31, 2015	2,273.3		$ 0.0	$ 2.3			3,520.4		$ 0.0	(532.7)	(886.1)	2,103.9		169.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(76.7)									(73.7)		(73.7)		(3.0)
Other comprehensive income (loss)	213.6										211.6	211.6		2.0
Issuance of common stock (in shares)				7,642
Issuance of common stock to former non-founder director for exercise of stock options	0.0
Conversion of PDH Common Stock into common stock (in shares)				325,431
Conversion of PDH Common Stock into common stock	0.0						3.8					3.8		(3.8)
Issuance of common stock under ESPP (in shares)				136,060
Issuance of common stock under ESPP	0.9						0.9					0.9
Equity compensation expense	7.4						7.4					7.4
Issuance of common stock at in equity offering (in shares)				48,787,878
Issuance of common stock in equity offering	402.5			$ 0.5			402.0					402.5
Issuance costs in connection with equity offering	(11.9)						(11.9)					(11.9)
Series B Convertible Preferred Stock settlement	87.8						54.9			32.9		87.8
Series B Convertible Preferred Stock settlement (in shares)				5,500,000
Changes in non-controlling interests	(7.1)						3.8					3.8		(10.9)
Balance (in shares) at Dec. 31, 2016			2,000,000	284,221,168					0
Balance at Dec. 31, 2016	2,889.8		$ 0.0	$ 2.8			3,981.3		$ 0.0	(573.5)	(674.5)	2,736.1		153.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(295.6)									(296.2)		(296.2)		0.6
Other comprehensive income (loss)	256.1										252.5	252.5		3.6
Exercise/ vesting of share based compensation (in shares)				122,769					6,618
Exercise/ vesting of share based compensation	$ 0.0						0.1		$ (0.1)
Issuance of common stock (in shares)	15,319
Conversion of PDH Common Stock into common stock (in shares)				2,923,436
Conversion of PDH Common Stock into common stock	$ 0.0			$ 0.1			35.6					35.7		(35.7)
Issuance of common stock under ESPP (in shares)				138,566
Issuance of common stock under ESPP	1.3						1.3					1.3
Equity compensation expense	11.7						11.7					11.7
Changes in non-controlling interests	(3.3)						2.0					2.0		(5.3)
Balance (in shares) at Dec. 31, 2017			2,000,000	287,405,939					6,618
Balance at Dec. 31, 2017	$ 2,860.0		$ 0.0	$ 2.9			$ 4,032.0		$ (0.1)	$ (869.7)	$ (422.0)	$ 2,743.1		$ 116.9