Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Estimated Useful Lives Of Assets

	Years
Plant, buildings and improvements	10-40
Production equipment	15-40
Other machinery and equipment	5-7
Land improvements	20
Railroad track and equipment	20
Computer hardware and software	3-5
Office furniture and equipment	5-7