Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019	Dec. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 636		$ 636		$ 1,715
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	24	$ 1,955	(54)	$ 1,885
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	199	1,922	1,052	1,706
Other (income) expense
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	0	0
Forward foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Collateral Already Posted, Aggregate Fair Value	380		380
Derivative, Notional Amount	43,600		43,600		45,300
Cross currency interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	26,500		26,500		$ 20,100
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	39	118	117
Unrealized gain (loss) arising during period	39	39	118	117
Cash Flow Hedging | Forward foreign exchange contracts | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	16	(23)	25	(29)
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	3	(8)	10	(43)
Cash Flow Hedging | Forward foreign exchange contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	156	(197)	330	(543)
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(81)	(77)	(316)	(213)
Cash Flow Hedging | Forward foreign exchange contracts | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(36)	1,939	(156)	1,847
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(13)	1,911	(121)	1,808
Cash Flow Hedging | Forward foreign exchange contracts | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(41)	5	(55)	15
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(8)	1	(10)	9
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	0	0
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	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	0	0
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	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	0	0
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0		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	0	0
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	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	0	0
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	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	65	159	790	299
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	$ 84	$ 89	$ 265	$ 207