CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Millions	Total	Total Stockholders' Equity	Preferred Stock	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income	Non- controlling Interests
Balance at Dec. 31, 2016	$ 2,889.8	$ 2,736.1	$ 0.0	$ 2.8	$ 3,981.3	$ 0.0	$ (573.5)	$ (674.5)	$ 153.7
Balance (in shares) at Dec. 31, 2016			2,000,000	284,221,168		0
Increase (Decrease) in Stockholders'
Net income	(295.6)	(296.2)					(296.2)		0.6
Other comprehensive income, net of taxes	256.1	252.5						252.5	3.6
Conversion of shares of common stock of PDH into common stock		35.7		$ 0.1	35.6				(35.7)
Conversion of PDH Common Stock into common stock (in shares)				2,923,436
Issuance of common stock under ESPP	1.3	1.3			1.3
Issuance of common stock under ESPP (in shares)				138,566
Equity compensation expense	11.7	11.7			11.7
Exercise/ vesting of share based compensation					0.1	$ (0.1)
Exercise/ vesting of share based compensation (in shares)				122,769		6,618
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	2,743.1	$ 0.0	$ 2.9	4,032.0	$ (0.1)	(869.7)	(422.0)	116.9
Increase (Decrease) in Stockholders'
Net income	(319.9)	(324.4)					(324.4)		4.5
Other comprehensive income, net of taxes	(370.7)	(336.2)						(336.2)	(34.5)
Conversion of shares of common stock of PDH into common stock		9.9			9.9				(9.9)
Conversion of PDH Common Stock into common stock (in shares)				793,063
Issuance of common stock under ESPP	1.2	1.2			1.2
Issuance of common stock under ESPP (in shares)				128,595
Equity compensation expense	18.9	18.9			18.9
Exercise/ vesting of share based compensation	(3.3)	(3.3)			0.1	$ (3.4)
Exercise/ vesting of share based compensation (in shares)				988,573		335,349
Changes in non-controlling interests	(5.1)								(5.1)
Balance (in shares) at Dec. 31, 2018			2,000,000	289,316,170		341,967
Balance at Dec. 31, 2018	2,181.1	2,109.2	$ 0.0	$ 2.9	4,062.1	$ (3.5)	(1,195.4)	(756.9)	71.9
Increase (Decrease) in Stockholders'
Net income	92.9	92.2					92.2		0.7
Other comprehensive income, net of taxes	27.0	27.0						27.0	0.0
Arysta Sale	411.0	457.6			(5.7)			463.3	(46.6)
Conversion of shares of common stock of PDH into common stock	0.0	27.3		$ 0.1	41.1			(13.9)	(27.3)
Conversion of PDH Common Stock into common stock (in shares)				4,019,710
Issuance of common stock under ESPP	1.1	1.1			1.1
Issuance of common stock under ESPP (in shares)				123,982
Repurchases of common stock	(507.2)	(507.2)		$ (0.4)		$ (73.5)	(433.3)
Repurchase of common stock (in shares)				(37,000,000)		7,764,242
Equity compensation expense	13.7	13.7			13.7
Exercise/ vesting of share based compensation					1.9	$ (1.9)
Exercise/ vesting of share based compensation (in shares)				1,968,471		170,989
Changes in non-controlling interests	(0.3)								(0.3)
Balance (in shares) at Dec. 31, 2019			2,000,000	258,428,333		8,277,198
Balance at Dec. 31, 2019	$ 2,219.3	$ 2,220.9	$ 0.0	$ 2.6	$ 4,114.2	$ (78.9)	$ (1,536.5)	$ (280.5)	$ (1.6)