Restructuring and Other Charges - Restructuring Charges in Consolidated Income (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) site	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Other charges:
Corporate severance-related costs	$ 0.0	$ 0.0	$ 3.5
Environmental remediation	(0.3)	0.1	0.9
Other	3.9	4.4	1.8
Total restructuring and other charges	$ 3.8	10.7	6.2
Exit costs		1.6
Number of environmental remediation sites | site	1
Nikolov V. Livent Corp | Pending Litigation
Other charges:
Legal fees accrued	$ 2.0
Severance-related and exit costs
Restructuring charges:
Restructuring charges	$ 0.2	$ 6.2	$ 0.0