Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018	Dec. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Available-for-sale Securities, Equity Securities	$ 863		$ 863		$ 511
Accumulated other comprehensive income on derivatives, after tax	(374)		$ (374)
Reclassification of foreign exchange contracts into earnings, period			next 12 months
Maximum length of time for hedge exposure			18 months
Unrealized gains on equity investments	$ 0	$ 0	$ 1	$ 0
Weighted average interest rate on non-current debt	3.20%		3.20%
Excess of the estimated fair value over the carrying value of debt					300
Business Combination, Contingent Consideration, Liability	$ 1,596		$ 1,596		335
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	1,596	403	1,596	403	335	$ 600
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements			0	(160)
Business Combination, Consideration Transferred, Liabilities Incurred			1,132	125
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			129	(162)
Forward foreign exchange contracts
Derivative [Line Items]
Collateral Already Posted, Aggregate Fair Value	68		68
Derivative notional amounts outstanding	47,300		47,300		41,100
Cross currency interest rate swaps
Derivative [Line Items]
Derivative notional amounts outstanding	18,800		18,800		7,300
Interest Rate Contract
Derivative [Line Items]
Derivative Liability, Noncurrent					3
Derivative notional amounts outstanding	500		500		500
Derivative Asset, Noncurrent	1		1		6
Equity Securities
Derivative [Line Items]
Available-for-sale Securities, Equity Securities	863		863		511
Equity Investments without readily determinable value | Equity Securities
Derivative [Line Items]
Equity, Fair Value Adjustment, Impairment Loss			(29)
Changes in fair value, changes in observable prices			1
Other (income) expense
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0
Fair Value Hedging [Member] | Sales [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	0	0	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	0	0
Fair Value Hedging [Member] | Sales [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Cost of Sales [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	0	0	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	0	0
Fair Value Hedging [Member] | Cost of Sales [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Research and Development Expense [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	0	0	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	0	0
Fair Value Hedging [Member] | Research and Development Expense [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Interest Income Expense Net Member | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	39	25	117	27
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	39	25	117	27
Fair Value Hedging [Member] | Interest Income Expense Net Member | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(3)	(7)	(2)	3
Fair Value Hedging [Member] | Other (income) expense | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	0	0	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	0	0
Fair Value Hedging [Member] | Other (income) expense | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Sales [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Cost of Sales [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Research and Development Expense [Member] | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	0
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Income Expense Net Member | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	3	7	2	(3)
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Other (income) expense | Interest Rate Contract
Derivative [Line Items]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	0	0	0	$ 0
Cash Flow Hedging [Member] | Sales [Member] | Forward foreign exchange contracts
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(8)	4
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	(23)	15
Cash Flow Hedging [Member] | Sales [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0
Cash Flow Hedging [Member] | Cost of Sales [Member] | Forward foreign exchange contracts
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(77)	97
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	(197)	192
Cash Flow Hedging [Member] | Cost of Sales [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0
Cash Flow Hedging [Member] | Research and Development Expense [Member] | Forward foreign exchange contracts
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	1,911	10
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	1,939	(4)
Cash Flow Hedging [Member] | Research and Development Expense [Member] | Cross currency interest rate swaps
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0
Cash Flow Hedging [Member] | Interest Income Expense Net Member | Forward foreign exchange contracts
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0
Cash Flow Hedging [Member] | Interest Income Expense Net Member | Cross currency interest rate swaps
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	89	34
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	159	35
Cash Flow Hedging [Member] | Other (income) expense | Forward foreign exchange contracts
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	1	(3)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	5	(1)
Cash Flow Hedging [Member] | Other (income) expense | Cross currency interest rate swaps
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	$ 0
Other Noncurrent Liabilities
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability	1,453		1,453		$ 335
Other Current Liabilities
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability	$ 143		$ 143