Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 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	1,276,703	281,547
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	87,271	66,574
(Gain) loss on sale of business/interest in properties	0	8,400
Stock-based compensation and other	10,540	4,245
Equity in net income of unconsolidated investments (net of tax)	(396,188)	(62,436)
Dividends received from unconsolidated investments and nonmarketable securities	547,552	39,168
Pension and postretirement benefit	1,954	(4,250)
Pension and postretirement contributions	(2,825)	(3,890)
Unrealized (gain) loss on investments in marketable securities	(45,732)	1,469
Deferred income taxes	14,098	27,747
Working capital changes	(764,071)	(219,397)
Non-cash transfer of 40% value of construction in progress of Kemerton plant to MRL	7,665	65,100
Other, net	(15,987)	1,899
Net cash provided by operating activities	720,980	206,176
Cash flows from investing activities:
Capital expenditures	(415,608)	(231,698)
(Purchases) sales of marketable securities, net	(122,267)	3,751
Investments in equity and other corporate investments	(1,133)	(146)
Net cash used in investing activities	(539,008)	(228,093)
Cash flows from financing activities:
Proceeds from borrowings of long-term debt and credit agreements	0	280,000
Other debt repayments, net	(713)	(166,615)
Dividends paid to shareholders	(46,282)	(45,637)
Dividends paid to noncontrolling interests	(53,145)	0
Proceeds from exercise of stock options	81	419
Withholding taxes paid on stock-based compensation award distributions	(18,617)	(10,422)
Other	0	(126)
Net cash (used in) provided by financing activities	(118,676)	57,619
Net effect of foreign exchange on cash and cash equivalents	24,296	(11,649)
Increase in cash and cash equivalents	87,592	24,053
Cash and cash equivalents at end of period	$ 1,586,734	$ 463,325