Financial Information By Industry Segment And Geographic Area (Information By Industry Segment, Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets		$ 30,587	$ 28,684
Industrial Packaging [Member]
Segment Reporting Information [Line Items]
Assets		14,483	14,852
Printing Papers [Member]
Segment Reporting Information [Line Items]
Assets		4,696	5,393
Consumer Packaging [Member]
Segment Reporting Information [Line Items]
Assets		2,115	3,249
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Assets	[1]	$ 9,293	$ 5,190

[1] Includes corporate assets and assets of businesses held for sale.