CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash and cash equivalents at beginning of year	$ 469,416	$ 529,650	$ 308,791
Cash flows from operating activities:
Net income	330,127	420,197	329,417
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	99,020	96,753	95,578
Non-cash charges associated with restructuring and other, net	61,809
Stock-based compensation	15,211	27,069	15,694
Excess tax benefits realized from stock-based compensation arrangements	(14,809)	(10,574)	(7,981)
Equity in net income of unconsolidated investments (net of tax)	(38,067)	(43,754)	(37,975)
Dividends received from unconsolidated investments and nonmarketable securities	26,908	23,685	16,414
Pension and postretirement expense	77,442	97,207	33,898
Pension and postretirement contributions	(21,610)	(59,773)	(80,105)
Unrealized gain on investments in marketable securities	(1,872)	(688)	(1,532)
Deferred income taxes	(14,587)	(11,198)	42,136
Change in current assets and liabilities:
Increase in accounts receivable	(25,992)	(16,435)	(57,414)
Decrease (increase) in inventories	7,364	(41,749)	(58,582)
(Increase) decrease in other current assets excluding deferred income taxes	(19,590)	4,499	(14,511)
(Decrease) increase in accounts payable	(16,798)	(11,971)	13,463
Increase in accrued expenses and income taxes payable	7,306	28,229	39,092
Other, net	16,904	(14,138)	3,717
Net cash provided by operating activities	488,766	487,359	331,309
Cash flows from investing activities:
Capital expenditures	(280,873)	(190,574)	(75,478)
Cash payments related to acquisitions and other	(3,360)	(13,164)	(11,978)
Cash impact from deconsolidation of Stannica LLC, net			(12,649)
Cash proceeds from divestitures	9,646		8,600
(Investments in) sales of marketable securities, net	(1,615)	1,670	652
Long-term advances to joint ventures	(24,959)
Investments in equity and other corporate investments		(10,868)	(1,338)
Net cash used in investing activities	(301,161)	(212,936)	(92,191)
Cash flows from financing activities:
Proceeds from issuance of senior notes			346,853
Proceeds from other borrowings		9,415	125,797
Repayments of long-term debt	(63,811)	(109,591)	(424,123)
Dividends paid to shareholders	(69,113)	(57,759)	(49,643)
Repurchases of common stock	(63,575)	(178,132)	(14,945)
Proceeds from exercise of stock options	21,148	2,230	7,135
Excess tax benefits realized from stock-based compensation arrangements	14,809	10,574	7,981
Withholding taxes paid on stock-based compensation award distributions	(9,124)	(3,129)	(3,988)
Dividends paid to noncontrolling interests	(7,628)
Debt financing costs		(2,727)	(3,005)
Net cash used in financing activities	(177,294)	(329,119)	(7,938)
Net effect of foreign exchange on cash and cash equivalents	(2,031)	(5,538)	(10,321)
Increase (decrease) in cash and cash equivalents	8,280	(60,234)	220,859
Cash and cash equivalents at end of year	$ 477,696	$ 469,416	$ 529,650