Shareholders' Equity - Changes in AOCI (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 03, 2016	Jul. 05, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	$ (3,286)	$ (2,932)
Other comprehensive income (loss) pretax	405	(231)
Provision (benefit) for income tax, net	84	(71)
Other comprehensive income (loss) net of tax	321	(160)
Balance, Period End	(2,965)	(3,092)
Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	(487)	(173)
Other comprehensive income (loss) pretax	158	(384)
Provision (benefit) for income tax, net	37	(135)
Other comprehensive income (loss) net of tax	121	(249)
Balance, Period End	(366)	(422)
Unrealized Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	20	22
Other comprehensive income (loss) pretax	(4)	0
Provision (benefit) for income tax, net	(2)	1
Other comprehensive income (loss) net of tax	(2)	(1)
Balance, Period End	18	21
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	178	541
Other comprehensive income (loss) pretax	125	(35)
Provision (benefit) for income tax, net	3	(3)
Other comprehensive income (loss) net of tax	122	(32)
Balance, Period End	300	509
Changes in Retirement Plans’ Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	(2,997)	(3,322)
Other comprehensive income (loss) pretax	126	188
Provision (benefit) for income tax, net	46	66
Other comprehensive income (loss) net of tax	80	122
Balance, Period End	$ (2,917)	$ (3,200)