Income Taxes (Principal Components Of The Company's Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Accruals not yet tax deductible	$ 123,514	$ 122,211
Pension and postretirement benefit plan obligations	219,071	201,206
Stock compensation	32,486	29,156
Net operating loss carryforward	28,914	27,048
Valuation allowance	(14,914)	(27,048)
Other, net	49,253	58,278
Deferred tax assets, net	438,324	410,851
Depreciation, tax in excess of book	(77,787)	(34,841)
Other	(25,767)	(15,610)
Deferred tax liabilities, net	(103,554)	(50,451)
Total	$ 334,770	$ 360,400