Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Accumulated depreciation	$ 19,146	$ 18,628
Common stock, par value	$ 0.30	$ 0.30
Common stock, shares authorized	1,800,000,000	1,800,000,000
Common stock, shares issued	1,018,112,000	1,004,351,000
Common stock, shares outstanding	0	0
Common stock held in treasury, shares	87,041,000	87,041,000