Shareholders' Equity - Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	$ (3,387)	$ (3,283)
Other comprehensive income (loss) pretax	169	413
Provision (benefit) for income tax, net	44	69
Other comprehensive income (loss) net of tax	125	344
Balance, Period End	(3,262)	(2,939)
Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	(345)	(487)
Other comprehensive income (loss) pretax	13	182
Provision (benefit) for income tax, net	4	45
Other comprehensive income (loss) net of tax	9	137
Balance, Period End	(336)	(350)
Unrealized Gains on Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	14	20
Other comprehensive income (loss) pretax	5	(9)
Provision (benefit) for income tax, net	1	(3)
Other comprehensive income (loss) net of tax	4	(6)
Balance, Period End	18	14
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	69	181
Other comprehensive income (loss) pretax	82	180
Provision (benefit) for income tax, net	15	5
Other comprehensive income (loss) net of tax	67	175
Balance, Period End	136	356
Changes in Retirement Plans’ Funded Status
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, Period Start	(3,125)	(2,997)
Other comprehensive income (loss) pretax	69	60
Provision (benefit) for income tax, net	24	22
Other comprehensive income (loss) net of tax	45	38
Balance, Period End	$ (3,080)	$ (2,959)