Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 29, 2013
Current assets:
Allowances for doubtful accounts	$ 310	$ 333
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	292,202	299,215