Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Sep. 30, 2012	Jan. 01, 2012
Current assets:
Allowances for doubtful accounts	$ 451	$ 361
Shareholders' equity:
Common stock, par value per share	$ 1.00	$ 1.00
Common stock, shares authorized	4,320,000	4,320,000
Common stock, shares issued	3,119,843	3,119,843
Treasury stock, shares	357,285	395,480