Summary of Significant Accounting Policies Property, Plant, and equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment [Table Text Block]

Property, plant, and equipment, including capitalized interest, are recorded at cost and consisted of the following:

Dollar amounts in millions	December 31,
	2019			2018
Property, plant, and equipment, at cost:
Land, land improvements, and logging roads, net of road amortization	$	168		$	169
Buildings	350			330
Machinery and equipment	1,965			1,949
Construction in progress	46			148
	2,529			2,596
Accumulated depreciation	(1,564		)	(1,586		)
Property, plant, and equipment, net	$	965		$	1,010