Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	$ (96)	$ (178)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(302)	(164)
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	500		$ 500
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Collateral Already Posted, Aggregate Fair Value	60
Derivative, Notional Amount	44,000		41,100
Cross currency interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Notional Amount	11,300		$ 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
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
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
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
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	1	5
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
Unrealized gain (loss) arising during period	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
Unrealized gain (loss) arising during period	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
Unrealized gain (loss) arising during period	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
Unrealized gain (loss) arising during period	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	38	0
Unrealized gain (loss) arising during period	38	0
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
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
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
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
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	(1)	(5)
Cash Flow Hedging | Foreign exchange contracts | Sales to customers
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	(21)	29
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(6)	31
Cash Flow Hedging | Foreign exchange contracts | Cost of products sold
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	(35)	2
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(296)	3
Cash Flow Hedging | Foreign exchange contracts | Research and Development Expense
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	(139)	(238)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(110)	(237)
Cash Flow Hedging | Foreign exchange contracts | Other (income) expense
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	6	(11)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	13	(18)
Cash Flow Hedging | Foreign exchange contracts | Interest (income)/Interest expense, net
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
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
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
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
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
Summary of designated derivatives
Gain/ (Loss) reclassified from Accumulated OCI into income	55	40
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	$ 59	$ 57