Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Sep. 30, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Receivables, allowances for doubtful accounts (in dollars)	$ 20	$ 17
Property, Plant and Equipment, accumulated depreciation (in dollars)	$ 7,789	$ 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	293,333,333	193,333,333
Common stock, shares issued	118,894,880	111,365,226
Common stock, shares outstanding	118,894,880	111,365,226