CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total		Common Stock, 0.001 Per Share Par Value		Capital In Excess of Par		Retained Earnings		Accumulated Other Comprehensive Loss		Treasury Stock
Beginning balance at Dec. 31, 2018	$ 489.6		$ 0.1		$ 512.3		$ 26.4		$ (49.2)		$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	50.2						50.2
Stock compensation plans	5.7				5.7
Reclassification of deferred hedging losses, net of $0.1 income tax	(1.2)								(1.2)
Foreign currency translation adjustments	(0.3)								(0.3)
Stockholders' Equity, Other	(1.6)				(1.6)
Transfer in of treasury stock - Livent NQSP	0.8										0.8
Ending balance at Dec. 31, 2019	544.0		0.1		516.4		76.6		(48.3)		(0.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	(16.3)	[1]					(16.3)
Stock compensation plans	4.4				4.4
Shares withheld for taxes - common stock issuances	(0.7)				(0.7)
Foreign currency translation adjustments	3.9	[1]							3.9
Exercise of stock options	0.8				0.8
Net sales of treasury stock - Livent NQSP	0.1										0.1
Ending balance at Dec. 31, 2020	536.2	[2]	0.1	[3]	520.9	[3]	60.3	[3]	(44.4)	[3]	(0.7)	[3]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	0.6						0.6
Stock compensation plans	5.3				5.3
Shares withheld for taxes - common stock issuances	(1.8)				(1.8)
Issuance of common stock - Offering	252.2				252.2
Net hedging gains, net of income tax expense	0.2								0.2
Foreign currency translation adjustments	1.3								1.3
Exercise of stock options	1.5				1.5
Transfer in of treasury stock - Livent NQSP	0.1										0.1
Ending balance at Dec. 31, 2021	$ 795.4		$ 0.1		$ 778.1		$ 60.9		$ (42.9)		$ (0.8)

[1] As adjusted for the adoption of ASU 2020-06 using the full retrospective method.

[2] As adjusted for the adoption of ASU 2020-06 using the full retrospective method.

[3] As adjusted for the adoption of ASU 2020-06 using the full retrospective method.