Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 1,499,142	$ 439,272
Cash flows from operating activities:
Net income	1,953,142	722,139
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	180,356	137,567
(Gain) loss on sale of business/interest in properties	0	8,400
Stock-based compensation and other	20,017	15,232
Equity in net income of unconsolidated investments (net of tax)	(947,239)	(190,592)
Dividends received from unconsolidated investments and nonmarketable securities	1,079,439	156,964
Pension and postretirement benefit	3,933	(8,273)
Pension and postretirement contributions	(8,632)	(7,685)
Unrealized (gain) loss on investments in marketable securities	(61,434)	3,061
Loss on early extinguishment of debt	0	19,219
Deferred income taxes	(144,720)	39,476
Working capital changes	(1,155,408)	(888,036)
Non-cash transfer of 40% value of construction in progress of Kemerton plant to MRL	11,623	96,314
Other, net	(136,390)	(43,475)
Net cash provided by operating activities	794,687	60,311
Cash flows from investing activities:
Acquisitions, net of cash acquired	(8,240)	0
Capital expenditures	(919,295)	(502,607)
(Purchases) sales of marketable securities, net	(123,979)	3,402
Investments in equity and other corporate investments	(1,192)	(767)
Net cash used in investing activities	(1,052,706)	(499,972)
Cash flows from financing activities:
Repayments of long-term debt and credit agreements	0	(455,000)
Proceeds from borrowings of long-term debt and credit agreements	300,000	1,964,216
Other debt repayments, net	(1,500)	(390,601)
Fees related to early extinguishment of debt	0	(9,767)
Dividends paid to shareholders	(93,317)	(91,894)
Dividends paid to noncontrolling interests	(53,145)	(26,525)
Proceeds from exercise of stock options	81	855
Withholding taxes paid on stock-based compensation award distributions	(24,910)	(10,583)
Other	0	(4,172)
Net cash provided by financing activities	127,209	976,529
Net effect of foreign exchange on cash and cash equivalents	231,406	(45,544)
Increase in cash and cash equivalents	100,596	491,324
Cash and cash equivalents at end of period	$ 1,599,738	$ 930,596