Shareholders' Equity - Changes in AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 05, 2015	Mar. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	$ (2,932)	$ (1,185)
Other comprehensive income (loss) before tax	(388)	3
Provision (benefit) for income tax, net	(104)	21
Other comprehensive income (loss) net of tax	(284)	(18)
Balance,	(3,216)	(1,203)
Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(173)	9
Other comprehensive income (loss) before tax	(383)	4
Provision (benefit) for income tax, net	(135)	1
Other comprehensive income (loss) net of tax	(248)	3
Balance,	(421)	12
Unrealized Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	22	15
Other comprehensive income (loss) before tax	2	3
Provision (benefit) for income tax, net	2	1
Other comprehensive income (loss) net of tax	0	2
Balance,	22	17
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	541	974
Other comprehensive income (loss) before tax	(104)	(65)
Provision (benefit) for income tax, net	(5)	(1)
Other comprehensive income (loss) net of tax	(99)	(64)
Balance,	442	910
Changes in Retirement Plans’ Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance,	(3,322)	(2,183)
Other comprehensive income (loss) before tax	97	61
Provision (benefit) for income tax, net	34	20
Other comprehensive income (loss) net of tax	63	41
Balance,	$ (3,259)	$ (2,142)