Description of the Business and Summary of Significant Accounting Policies (Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, plant and equipment
Depreciation expense	$ 290,500	$ 285,600	$ 283,300
Property, plant and equipment, gross	7,331,616	6,124,714
Less accumulated depreciation	3,226,047	2,988,828
Property, plant and equipment, net	4,105,569	3,135,886
Land and improvements
Property, plant and equipment
Property, plant and equipment, gross	340,495	333,879
Buildings and improvements
Property, plant and equipment
Property, plant and equipment, gross	$ 860,641	805,381
Buildings and improvements | Minimum
Property, plant and equipment
Property, plant and equipment useful life	10 years
Buildings and improvements | Maximum
Property, plant and equipment
Property, plant and equipment useful life	40 years
Plant, machinery and equipment
Property, plant and equipment
Property, plant and equipment, gross	$ 4,827,791	4,594,778
Plant, machinery and equipment | Minimum
Property, plant and equipment
Property, plant and equipment useful life	3 years
Plant, machinery and equipment | Maximum
Property, plant and equipment
Property, plant and equipment useful life	20 years
Construction in progress
Property, plant and equipment
Property, plant and equipment, gross	$ 1,302,689	$ 390,676