Segments of Business and Geographic Areas (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Sales by geographic area
Sales	$ 17,102	$ 18,467	$ 52,263	$ 56,077
Percentage Change In Sales By Geographic Area	(7.40%)		(6.80%)
UNITED STATES
Sales by geographic area
Sales	$ 8,791	8,842	$ 26,394	26,178
Percentage Change In Sales By Geographic Area	(0.60%)		0.80%
Europe
Sales by geographic area
Sales	$ 3,802	4,446	$ 11,993	14,387
Percentage Change In Sales By Geographic Area	(14.50%)		(16.60%)
Western Hemisphere, excluding U.S.
Sales by geographic area
Sales	$ 1,463	1,820	$ 4,603	5,378
Percentage Change In Sales By Geographic Area	(19.60%)		(14.40%)
Asia-Pacific, Africa
Sales by geographic area
Sales	$ 3,046	$ 3,359	$ 9,273	$ 10,134
Percentage Change In Sales By Geographic Area	(9.30%)		(8.50%)