Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements Of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 469,416	$ 529,650
Cash flows from operating activities:
Net income	112,414	113,767
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	24,235	23,004
Stock-based compensation	6,926	6,789
Excess tax benefits realized from stock-based compensation arrangements	(4,544)	(3,867)
Equity in net income of unconsolidated investments (net of tax)	(8,586)	(12,831)
Dividends received from unconsolidated investments and nonmarketable securities	4,183	2,221
Pension and postretirement expense	10,024	6,463
Pension and postretirement contributions	(2,527)	(51,949)
Unrealized gain on investments in marketable securities	(1,262)	(1,483)
Deferred income taxes	7,238	21,209
Working capital changes	(32,728)	(52,116)
Other, net	8,171	(4,651)
Net cash provided by operating activities	123,544	46,556
Cash flows from investing activities:
Capital expenditures	(54,784)	(31,894)
Cash payments related to acquisitions and other	(134)	(633)
(Investments in) sales of marketable securities, net	(1,113)	1,872
Investments in equity and other corporate investments		(10,666)
Net cash used in investing activities	(56,031)	(41,321)
Cash flows from financing activities:
Repayments of long-term debt	(7,149)	(100,622)
Proceeds from borrowings		6,694
Dividends paid to shareholders	(15,578)	(12,856)
Proceeds from exercise of stock options	2,569	205
Excess tax benefits realized from stock-based compensation arrangements	4,544	3,867
Withholding taxes paid on stock-based compensation award distributions	(6,516)	(551)
Net cash used in financing activities	(22,130)	(103,263)
Net effect of foreign exchange on cash and cash equivalents	4,560	9,391
Increase (decrease) in cash and cash equivalents	49,943	(88,637)
Cash and cash equivalents at end of period	$ 519,359	$ 441,013