Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019	Dec. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Business Combination, Contingent Consideration, Liability	$ 796		$ 796		$ 1,715
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	60	$ 26	(78)	$ (70)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	21	86	853	(216)
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	926		926
Derivative, Notional Amount	43,900		43,900		45,300
Cross currency interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	22,200		22,200		$ 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	79	78
Unrealized gain (loss) arising during period	39	39	79	78
Cash Flow Hedging | Forward foreign exchange contracts | Sales to customers
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(2)	0	9	(6)
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(2)	(14)	7	(35)
Cash Flow Hedging | Forward foreign exchange contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(128)	(50)	174	(346)
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(62)	(101)	(235)	(136)
Cash Flow Hedging | Forward foreign exchange contracts | Research and Development Expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	(10)	18	(120)	(92)
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	2	36	(108)	(103)
Cash Flow Hedging | Forward foreign exchange contracts | Other (income) expense
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) arising during period	22	(3)	(14)	10
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	2	(2)	8
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	100	82	725	140
Summary of designated derivatives
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	$ 83	$ 64	$ 181	$ 118