Goodwill and Other Intangibles Changes in Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 1,578,785	$ 1,567,169
Foreign currency translation adjustments and other	82,150	(20,146)
Goodwill, Ending Balance	1,665,520	1,578,785
All Other
Goodwill [Roll Forward]
Goodwill, Beginning Balance	6,586	6,586
Foreign currency translation adjustments and other	0	0
Goodwill, Ending Balance	6,586	6,586
Reportable Segments \| Lithium
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,370,846	1,354,779
Foreign currency translation adjustments and other	66,350	(15,695)
Goodwill, Ending Balance	1,441,781	1,370,846
Reportable Segments \| Bromine Specialties
Goodwill [Roll Forward]
Goodwill, Beginning Balance	20,319	20,319
Foreign currency translation adjustments and other	0	0
Goodwill, Ending Balance	20,319	20,319
Reportable Segments \| Catalysts
Goodwill [Roll Forward]
Goodwill, Beginning Balance	181,034	185,485
Foreign currency translation adjustments and other	15,800	(4,451)
Goodwill, Ending Balance	196,834	181,034
Reportable Segments \| Refining Solutions
Goodwill [Roll Forward]
Goodwill, Ending Balance	189,800
Reportable Segments \| PCS
Goodwill [Roll Forward]
Goodwill, Ending Balance	7,000
Mineral Resources Limited Wodgina Project
Goodwill [Roll Forward]
Acquisitions	4,585	31,762
Goodwill, Ending Balance	36,347
Mineral Resources Limited Wodgina Project \| All Other
Goodwill [Roll Forward]
Acquisitions	0	0
Mineral Resources Limited Wodgina Project \| Reportable Segments \| Lithium
Goodwill [Roll Forward]
Acquisitions	4,585	31,762
Mineral Resources Limited Wodgina Project \| Reportable Segments \| Bromine Specialties
Goodwill [Roll Forward]
Acquisitions	0	0
Mineral Resources Limited Wodgina Project \| Reportable Segments \| Catalysts
Goodwill [Roll Forward]
Acquisitions	$ 0	$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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