CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Preferred stock, par value	$ 0	$ 0
Preferred stock, authorized	165,000,000	165,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	3,500,000,000	3,500,000,000
Common stock, issued	1,660,600,000	1,660,600,000
Common stock in treasury, shares	637,400,000	607,000,000