CONDENSED CONSOLIDATED STATEMENTS 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, 2018	$ 2,181.1	$ 2,109.2	$ 0.0	$ 2.9	$ 4,062.1	$ (3.5)	$ (1,195.4)	$ (756.9)	$ 71.9
Balance (in shares) at Dec. 31, 2018			2,000,000	289,316,170		341,967
Increase (Decrease) in Stockholders' Equity
Net income (loss)	25.3	24.7					24.7		0.6
Other comprehensive income (loss), net of taxes	49.1	49.1						49.1
Arysta Sale	411.0	457.6			(5.7)			463.3	(46.6)
Exercise/ vesting of share based compensation	0.0				1.9	$ (1.9)
Exercise/ vesting of share based compensation (in shares)				1,929,518		170,989
Conversion of shares	0.0	27.3		$ 0.1	41.1			(13.9)	(27.3)
Conversion of shares (shares)				(4,019,710)
Issuance of common stock under ESPP	0.6	0.6			0.6
Issuance of common stock under ESPP (in shares)				58,425
Repurchases of common stock	(445.1)	(445.1)		$ (0.4)		$ (11.4)	(433.3)
Repurchases of common stock (in shares)				(37,000,000)		1,154,585
Equity compensation expense	9.4	9.4			9.4
Changes in non-controlling interests	(0.2)								(0.2)
Balance at Jun. 30, 2019	2,231.2	2,232.8	$ 0.0	$ 2.6	4,109.4	$ (16.8)	(1,604.0)	(258.4)	(1.6)
Balance (in shares) at Jun. 30, 2019			2,000,000	258,323,823		1,667,541
Balance at Mar. 31, 2019	2,255.2	2,256.7	$ 0.0	$ 2.6	4,105.1	$ (5.4)	(1,605.5)	(240.1)	(1.5)
Balance (in shares) at Mar. 31, 2019			2,000,000	257,955,093		512,956
Increase (Decrease) in Stockholders' Equity
Net income (loss)	1.4	1.5					1.5		(0.1)
Other comprehensive income (loss), net of taxes	(18.3)	(18.3)						(18.3)
Exercise/ vesting of share based compensation	1.9	1.9			1.9
Exercise/ vesting of share based compensation (in shares)				336,703
Issuance of common stock under ESPP	0.3	0.3			0.3
Issuance of common stock under ESPP (in shares)				32,027
Repurchases of common stock	(11.4)	(11.4)				$ (11.4)
Repurchases of common stock (in shares)						1,154,585
Equity compensation expense	2.1	2.1			2.1
Balance at Jun. 30, 2019	2,231.2	2,232.8	$ 0.0	$ 2.6	4,109.4	$ (16.8)	(1,604.0)	(258.4)	(1.6)
Balance (in shares) at Jun. 30, 2019			2,000,000	258,323,823		1,667,541
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)
Balance (in shares) at Dec. 31, 2019			2,000,000	258,428,333		8,277,198
Increase (Decrease) in Stockholders' Equity
Net income (loss)	9.8	9.8					9.8
Other comprehensive income (loss), net of taxes	(43.3)	(43.3)						(43.3)
Exercise/ vesting of share based compensation	(1.8)	(1.8)			0.2	$ (2.0)
Exercise/ vesting of share based compensation (in shares)				557,541		170,227
Conversion of shares (shares)			(2,000,000)	2,000,000
Issuance of common stock under ESPP	0.5	0.5			0.5
Issuance of common stock under ESPP (in shares)				58,566
Repurchases of common stock	(33.1)	(33.1)				$ (33.1)
Repurchases of common stock (in shares)						3,742,488
Equity compensation expense	3.8	3.8			3.8
Changes in non-controlling interests	(0.1)								(0.1)
Balance at Jun. 30, 2020	2,155.1	2,156.8	$ 0.0	$ 2.6	4,118.7	$ (114.0)	(1,526.7)	(323.8)	(1.7)
Balance (in shares) at Jun. 30, 2020			0	261,044,440		12,189,913
Balance at Mar. 31, 2020	2,141.4	2,143.0	$ 0.0	$ 2.6	4,117.1	$ (113.9)	(1,527.9)	(334.9)	(1.6)
Balance (in shares) at Mar. 31, 2020			0	260,933,009		12,182,019
Increase (Decrease) in Stockholders' Equity
Net income (loss)	1.2	1.2					1.2
Other comprehensive income (loss), net of taxes	11.1	11.1						11.1
Exercise/ vesting of share based compensation	(0.1)	(0.1)				$ (0.1)
Exercise/ vesting of share based compensation (in shares)				81,554		7,894
Issuance of common stock under ESPP	0.2	0.2			0.2
Issuance of common stock under ESPP (in shares)				29,877
Equity compensation expense	1.4	1.4			1.4
Changes in non-controlling interests	(0.1)								(0.1)
Balance at Jun. 30, 2020	$ 2,155.1	$ 2,156.8	$ 0.0	$ 2.6	$ 4,118.7	$ (114.0)	$ (1,526.7)	$ (323.8)	$ (1.7)
Balance (in shares) at Jun. 30, 2020			0	261,044,440		12,189,913