Acquisitions - Additional Details (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Oct. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Purchase price adjustments				$ (22,572)	$ 0
Acquisition and integration related costs		$ 5,470	$ 4,990	8,426	10,274
Net loss attributable to joint venture		85,624	154,198	192,828	287,767
Net sales		764,049	$ 885,052	1,502,894	$ 1,717,116
Goodwill		1,571,280		1,571,280		$ 1,578,785
Mineral Resources Limited Wodgina Project
Business Acquisition [Line Items]
Ownership percentage	60.00%
Consideration transferred	$ 1,300,000			1,322,566
Cash payments related to joint venture				820,000
Purchase price adjustments				(22,600)
Net loss attributable to joint venture		(5,200)		(9,900)
Net sales				0
Goodwill		18,795		18,795
Purchase price allocation adjustments		13,000		13,000
Mineral Resources Limited Wodgina Project | Stamp Duty Tax
Business Acquisition [Line Items]
Acquisition and integration related costs		61,500
Wodgina Lithium Operations Pty. Ltd.
Business Acquisition [Line Items]
Ownership percentage	60.00%
Lithium Hydroxide Conversion Assets
Business Acquisition [Line Items]
Ownership percentage	40.00%
Lithium Hydroxide Conversion Assets | Mineral Resources Limited Wodgina Project
Business Acquisition [Line Items]
Consideration transferred				480,000
Mineral Reserves | Mineral Resources Limited Wodgina Project
Business Acquisition [Line Items]
Fair value of mineral reserves		1,025,900		1,025,900
Selling, general and administrative expenses | Mineral Resources Limited Wodgina Project
Business Acquisition [Line Items]
Acquisition and integration related costs		$ 400		$ 800