Consolidated Statements of Financial Position (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Allowance for doubtful accounts	$ 162	$ 196
Stockholders' Equity:
Common stock, par value	$ 0.00	$ 0.00
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	169,247,282	169,428,406
Common stock, shares outstanding	169,247,282	169,428,406