Consolidated Statements of Financial Position (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Allowance for doubtful accounts	$ 160	$ 162
Stockholders' Equity:
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	170,112,217	169,247,282
Common stock, shares outstanding	170,112,217	169,247,282