Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Dec. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 1,596		$ 1,596		$ 335
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	1,955	$ 166	1,885	$ 91
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	1,922	262	1,706	37
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	500		500		500
Forward foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Collateral Already Posted, Aggregate Fair Value	68		68
Derivative, Notional Amount	47,300		47,300		41,100
Cross currency interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	18,800		18,800		$ 7,300
Fair Value Hedging | Interest Rate Contract | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Interest Rate Contract | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Interest Rate Contract | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Interest Rate Contract | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Interest Rate Contract | Interest (income)/Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(3)	(7)	(2)	3
Fair Value Hedging | Cross currency interest rate swaps | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0	0	0
Unrealized gain (loss) arising during period	0	0	0	0
Fair Value Hedging | Cross currency interest rate swaps | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0	0	0
Unrealized gain (loss) arising during period	0	0	0	0
Fair Value Hedging | Cross currency interest rate swaps | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0	0	0
Unrealized gain (loss) arising during period	0	0	0	0
Fair Value Hedging | Cross currency interest rate swaps | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	0	0	0
Unrealized gain (loss) arising during period	0	0	0	0
Fair Value Hedging | Cross currency interest rate swaps | Interest (income)/Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	39	25	117	27
Unrealized gain (loss) arising during period	39	25	117	27
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging | Designated as Hedging Instrument | Interest Rate Contract | Interest (income)/Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	3	7	2	(3)
Cash Flow Hedging | Forward foreign exchange contracts | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(23)	15
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			(43)	50
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			(29)	(3)
Cash Flow Hedging | Forward foreign exchange contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(197)	192
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			(213)	175
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			(543)	138
Cash Flow Hedging | Forward foreign exchange contracts | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	1,939	(4)
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			1,808	(242)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			1,847	(220)
Cash Flow Hedging | Forward foreign exchange contracts | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	5	(1)
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			9	(24)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			15	(16)
Cash Flow Hedging | Forward foreign exchange contracts | Interest (income)/Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	0	0
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			0	0
Cash Flow Hedging | Cross currency interest rate swaps | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	0	0
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			0	0
Cash Flow Hedging | Cross currency interest rate swaps | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	0	0
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			0	0
Cash Flow Hedging | Cross currency interest rate swaps | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	0	0
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			0	0
Cash Flow Hedging | Cross currency interest rate swaps | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	0	0
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			0	0
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			0	0
Cash Flow Hedging | Cross currency interest rate swaps | Interest (income)/Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	$ 159	$ 35
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income			207	106
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax			$ 299	$ 111