Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 1,192,230	$ 889,900
Cash flows from operating activities:
Net loss	(63,450)	(1,220,588)
Adjustments to reconcile net loss to cash flows from operating activities:
Depreciation and amortization	494,968	425,532
Non-cash goodwill impairment charges	181,070	0
Non-cash restructuring and asset write-offs	0	1,075,888
Stock-based compensation and other	28,048	24,443
Equity in net income of unconsolidated investments (net of tax)	(203,184)	(696,436)
Dividends received from unconsolidated investments and nonmarketable securities	89,048	348,358
Pension and postretirement expense	5,361	3,806
Pension and postretirement contributions	(15,849)	(13,339)
Realized loss on investments in marketable securities	0	33,746
Unrealized (gain) loss on investments in marketable securities	(4,955)	26,982
Deferred income taxes	10,316	(112,777)
Working capital changes	46,478	830,851
Noncurrent liability changes and other, net	325,931	(34,211)
Net cash provided by operating activities	893,782	692,255
Cash flows from investing activities:
Capital expenditures	(434,416)	(1,337,719)
Proceeds from sale of property and equipment	25,651	0
Proceeds from sale of available for sale debt securities	288,000	0
Proceeds (payments) from settlement of foreign currency forward contracts, net	144,540	(1,956)
Sales of marketable securities, net	7,038	83,651
Investments in equity investments and nonmarketable securities	(180)	(217)
Net cash provided by (used in) investing activities	30,633	(1,256,241)
Cash flows from financing activities:
Proceeds from issuance of mandatory convertible preferred stock, net of issuance costs	0	2,236,750
Repayments of long-term debt and credit agreements	(47,947)	(84,403)
Proceeds from borrowings of long-term debt and credit agreements	38,332	84,403
Other debt repayments, net	(3,694)	(629,434)
Dividends paid to common shareholders	(142,899)	(140,929)
Dividends paid to mandatory convertible preferred shareholders	(125,063)	(81,059)
Dividends paid to noncontrolling interests	(18,169)	(37,176)
Proceeds from exercise of stock options	1,494	114
Withholding taxes paid on stock-based compensation award distributions	(3,170)	(10,892)
Other	(55)	(2,758)
Net cash (used in) provided by financing activities	(301,171)	1,334,616
Net effect of foreign exchange on cash and cash equivalents	116,284	3,989
Increase in cash and cash equivalents	739,528	774,619
Cash and cash equivalents at end of period	$ 1,931,758	$ 1,664,519