(Information By Industry Segment, Capital Spending) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Capital Spending	$ 921	$ 1,141	$ 931
Operating Segments [Member]
Segment Reporting Information [Line Items]
Capital Spending	896	1,105	905
Operating Segments [Member] | Industrial Packaging
Segment Reporting Information [Line Items]
Capital Spending	763	928	762
Operating Segments [Member] | Global Cellulose Fibers
Segment Reporting Information [Line Items]
Capital Spending	133	177	143
Corporate and other
Segment Reporting Information [Line Items]
Capital Spending	$ 25	$ 36	$ 26