Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Receivables, allowances for doubtful accounts (in dollars)	$ 18	$ 17
Property, Plant and Equipment, accumulated depreciation (in dollars)	$ 7,658	$ 7,241
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized shares	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized shares	2,900,000,000	2,900,000,000
Common stock, shares issued	1,705,394,953	1,670,478,384
Common stock, shares outstanding	1,705,394,953	1,670,478,384