(Information By Industry Segment, Capital Spending) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Capital Spending	$ 931	$ 480	$ 663
Operating Segments [Member]
Segment Reporting Information [Line Items]
Capital Spending	905	465	650
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Capital Spending	762	382	554
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Capital Spending	143	83	96
Corporate and other
Segment Reporting Information [Line Items]
Capital Spending	$ 26	$ 15	$ 13