Condensed Consolidated Statements of Changes in Equity Statement - USD ($) $ in Millions		Total	Common Stock $0.10 Par Value	Capital In Excess of Par	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Non-controlling Interest
Beginning balance at Dec. 31, 2018		$ 3,210.4	$ 18.6	$ 776.2	$ 4,334.3	$ (308.9)	$ (1,699.1)	$ 89.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		217.2			215.7			1.5
Stock compensation plans		16.6		9.4			7.2
Shares for benefit plan trust		(1.1)					(1.1)
Net pension and other benefit actuarial gains (losses) and prior service costs, net of income tax	[1]	3.4				3.4
Net hedging gains (losses) and other, net of income tax	[1]	(2.7)				(2.7)
Foreign currency translation adjustments	[1]	(2.4)				(2.1)		(0.3)
Dividends		(52.8)			(52.8)
Repurchases of common stock		(114.2)					(114.2)
Divestiture of Livent	[2]	(485.0)			(464.3)	39.0		(59.7)
Ending balance at Mar. 31, 2019		2,791.8	18.6	785.6	4,088.4	(324.4)	(1,807.2)	30.8
Beginning balance at Dec. 31, 2019		2,561.4	18.6	829.7	4,188.8	(412.0)	(2,092.8)	29.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		206.2			206.2			0.0
Stock compensation plans		16.5		10.5			6.0
Shares for benefit plan trust		(0.4)					(0.4)
Net pension and other benefit actuarial gains (losses) and prior service costs, net of income tax	[1]	1.6				1.6
Net hedging gains (losses) and other, net of income tax	[1]	17.2				17.2
Foreign currency translation adjustments	[1]	(35.4)				(33.6)		(1.8)
Dividends		(57.1)			(57.1)
Repurchases of common stock		(7.3)					(7.3)
Ending balance at Mar. 31, 2020		$ 2,702.7	$ 18.6	$ 840.2	$ 4,337.9	$ (426.8)	$ (2,094.5)	$ 27.3

[1] See condensed consolidated statements of comprehensive income (loss).

[2] Represents the effects of the distribution of FMC Lithium.