Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		15 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jan. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ 843	$ (295)	$ 1,238	$ 584
Equity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	200		200		$ 200	$ 300
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Collateral Already Posted, Aggregate Fair Value	20		20		20
Derivative, Notional Amount	35,800		35,800		35,800	36,000
Cross currency interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	2,300		2,300		2,300	$ 2,300
Designated as Hedging Instrument
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	154	(250)	(70)	(441)
Gain/ (Loss) reclassified from Accumulated OCI into income	(140)	10	(319)	(112)
Gain/ (Loss) recognized in Other income/expense	0	(3)	(11)	(10)
Designated as Hedging Instrument | Foreign exchange contracts | Sales to customers
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	36	(27)	22	(27)
Gain/ (Loss) reclassified from Accumulated OCI into income	(6)	(3)	(39)	(21)
Gain/ (Loss) recognized in Other income/expense	(1)	0	(1)	0
Designated as Hedging Instrument | Foreign exchange contracts | Cost of products sold
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	218	(178)	121	(222)
Gain/ (Loss) reclassified from Accumulated OCI into income	(68)	13	(99)	(8)
Gain/ (Loss) recognized in Other income/expense	1	(2)	(16)	(6)
Designated as Hedging Instrument | Foreign exchange contracts | Research and development expense
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	(19)	12	(128)	(95)
Gain/ (Loss) reclassified from Accumulated OCI into income	1	(1)	(101)	(96)
Gain/ (Loss) recognized in Other income/expense	1	(1)	6	(1)
Designated as Hedging Instrument | Foreign exchange contracts | Other (income) expense, net
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	(12)	(54)	(44)	(106)
Gain/ (Loss) reclassified from Accumulated OCI into income	(2)	(6)	(37)	(2)
Gain/ (Loss) recognized in Other income/expense	(1)	0	0	(3)
Designated as Hedging Instrument | Cross currency interest rate swaps | Interest (income)/Interest expense, net
Summary of designated derivatives
Gain/ (Loss) recognized in Accumulated OCI	(69)	(3)	(41)	9
Gain/ (Loss) reclassified from Accumulated OCI into income	(65)	7	(43)	15
Gain/ (Loss) recognized in Other income/expense	0	$ 0	0	$ 0
Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	$ (268)		$ (378)		$ (3)