Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Restructuring And Other Charges) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Restructuring and other charges	$ 252	$ 846	$ 156
Industrial Packaging [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	0	7	(2)
Printing Papers [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	0	554	118
Consumer Packaging [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	10	8	45
Corporate [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges	$ 242	$ 277	$ (5)