Property, Plant and Equipment (Summary Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 7,486,284	$ 6,243,775
Less accumulated depreciation and amortization	3,215,494	2,873,427
Net property, plant and equipment	4,270,790	3,370,348
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	385,027	288,633
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	1,413,877	1,189,408
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	4,603,911	3,979,349
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	211,730	236,183
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	78,803	77,976
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 792,936	$ 472,226