Financial Information By Industry Segment And Geographic Area (Information By Geographic Area, Long-Lived Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Long-Lived Assets	[1]	$ 13,469	$ 13,713
Operating Segments [Member] | United States (k)
Segment Reporting Information [Line Items]
Long-Lived Assets	[1]	10,586	10,545
Operating Segments [Member] | EMEA
Segment Reporting Information [Line Items]
Long-Lived Assets	[1]	1,315	1,302
Operating Segments [Member] | Pacific Rim and Asia
Segment Reporting Information [Line Items]
Long-Lived Assets	[1]	201	236
Operating Segments [Member] | Americas, other than U.S.
Segment Reporting Information [Line Items]
Long-Lived Assets	[1]	$ 1,367	$ 1,630

[1] Long-Lived Assets includes Forestlands and Plants, Properties and Equipment, net.