Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets (Unaudited)
Allowances for doubtful accounts	$ 908	$ 957
Common stock, par value	$ 1	$ 1
Common stock, authorized	14,000,000,000	14,000,000,000
Common stock, issued	6,495,231,088	6,495,231,088
Treasury stock, held	570,191,742	584,144,220