Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019	Dec. 29, 2019
Derivative [Line Items]
Available-for-sale Securities, Equity Securities	$ 1,488		$ 1,488		$ 1,148
Accumulated other comprehensive income on derivatives, after tax	636		$ 636
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	$ (2)	$ 1	$ 0	$ 1
Weighted average interest rate on non-current debt	3.24%		3.24%
Excess of the estimated fair value over the carrying value of debt					3,000
Current Debt	$ 5,332		$ 5,332		1,202
Reversal of contingent consideration			938	(35)
Commercial Paper
Derivative [Line Items]
Current Debt	$ 2,700		$ 2,700
Weighted average interest rate	0.15%		0.15%
Term			3 months 21 days
Forward foreign exchange contracts
Derivative [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 [Line Items]
Derivative, Notional Amount	22,200		22,200		20,100
Interest Rate Contract
Derivative [Line Items]
Derivative Asset, Noncurrent					1
Equity Investments without readily determinable value | Equity Securities
Derivative [Line Items]
Equity, Fair Value Adjustment, Impairment Loss			(39)
Equity, Fair Value Adjustment, Change In Observable Price			11
Equity Securities without Readily Determinable Fair Value, Amount	712		712		$ 712
Changes in Fair Value Reflected in Net Income			(28)
Equity Investments with readily determinable value | Equity Securities
Derivative [Line Items]
Changes in Fair Value Reflected in Net Income			196
Other (income) expense
Derivative [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	0	0	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] | 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] | 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] | Interest Income Expense Net Member | Cross currency interest rate swaps
Derivative [Line Items]
Derivative, Excluded Component, Gain (Loss), Recognized in Earnings	39	39	79	78
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	39	39	79	78
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
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	(2)	(14)	7	(35)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	(2)	0	9	(6)
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	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	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	(62)	(101)	(235)	(136)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	(128)	(50)	174	(346)
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		0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	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	2	36	(108)	(103)
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	(10)	18	(120)	(92)
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	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	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	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	0	0	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	83	64	181	118
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	100	82	725	140
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	0	2	(2)	8
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	22	(3)	(14)	10
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	0	0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments, after Tax	$ 0	$ 0	$ 0	$ 0