Acquisitions - Additional Details (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 31, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Purchase price adjustments				$ (22,572)	$ 0
Acquisition and integration related costs		$ 5,928	$ 4,114	14,349	14,388
Net loss attributable to joint venture		98,301	155,070	291,129	442,837
Net sales		746,868	879,747	2,249,762	2,596,863
Goodwill		1,603,049		1,603,049		$ 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		4,700		14,600
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		$ 200	$ 1,300	$ 1,000	$ 4,400