CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 1,137,303	$ 2,269,756	$ 213,734
Cash flows from operating activities:
Net income	739,139	99,468	680,769
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	200,698	196,928	226,169
Gain on acquisition	0	(6,221)	0
Gain on sales of businesses, net	(210,428)	0	(510,278)
Stock-based compensation	15,228	19,404	17,031
Equity in net income of unconsolidated investments (net of tax)	(89,264)	(84,487)	(61,534)
Dividends received from unconsolidated investments and nonmarketable securities	57,415	39,386	43,759
Pension and postretirement expense (benefit)	10,410	(12,436)	41,546
Pension and postretirement contributions	(15,236)	(13,341)	(20,068)
Unrealized gain on investments in marketable securities	(527)	(3,135)	(3,655)
Loss on early extinguishment of debt	0	52,801	1,921
Deferred income taxes	49,164	(41,941)	21,121
Changes in current assets and liabilities, net of effects of acquisitions and divestitures:
(Increase) in accounts receivable	(97,448)	(74,545)	(42,816)
(Increase) decrease in inventories	(124,067)	(101,545)	25,974
(Increase) decrease in other current assets	(2,181)	(213)	1,808
Increase in accounts payable	73,730	53,421	43,953
(Decrease) increase in accrued expenses and income taxes payable	(1,999)	(269,381)	210,276
Other, net	(58,469)	449,816	59,548
Net cash provided by operating activities	546,165	303,979	735,524
Cash flows from investing activities:
Acquisitions, net of cash acquired	(11,403)	(44,367)	(126,747)
Cash payments related to acquisitions and other	0	0	(81,987)
Capital expenditures	(699,991)	(317,703)	(196,654)
Cash proceeds from divestitures, net	413,569	6,857	3,325,571
(Investments in) sales of marketable securities, net	(270)	(275)	305
Repayments from joint ventures	0	1,250	0
Investments in equity and other corporate investments	(5,600)	(3,565)	0
Net cash (used in) provided by investing activities	(303,695)	(357,803)	2,920,488
Cash flows from financing activities:
Proceeds from borrowings of other long-term debt	0	27,000	0
Repayments of long-term debt	0	(778,209)	(1,252,302)
Other (repayments) borrowings, net	(113,567)	138,751	(163,721)
Fees related to early extinguishment of debt	0	(46,959)	0
Dividends paid to shareholders	(144,596)	(140,557)	(135,353)
Dividends paid to noncontrolling interests	(14,756)	(36,756)	(35,855)
Repurchases of common stock	(500,000)	(250,000)	0
Proceeds from exercise of stock options	3,633	8,238	9,401
Withholding taxes paid on stock-based compensation award distributions	(17,240)	(8,376)	(2,194)
Net cash used in financing activities	(786,526)	(1,086,868)	(1,580,024)
Net effect of foreign exchange on cash and cash equivalents	(37,927)	8,239	(19,966)
(Decrease) increase in cash and cash equivalents	(581,983)	(1,132,453)	2,056,022
Cash and cash equivalents at end of year	$ 555,320	$ 1,137,303	$ 2,269,756