Retirement Benefits (Net Periodic Pension Costs) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
U.S. Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	88	87	264	262
Expected return on plan assets	(91)	(105)	(273)	(316)
Amortization of unrecognized net loss	31	65	95	195
Amortization of unrecognized prior service cost	0	0	0	0
Net postretirement health care expense (benefits)	28	47	86	141
Contributions			122
Non-U.S. Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	3	8	8
Interest cost	19	18	52	55
Expected return on plan assets	(21)	(19)	(58)	(58)
Amortization of unrecognized net loss	5	6	11	16
Amortization of unrecognized prior service cost	(1)	(1)	(5)	(2)
Net postretirement health care expense (benefits)	4	7	8	19
Contributions			$ 24