Fair Value Measurements - Summary of Derivative Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	$ 789	$ 53	$ (7)
Amount of gain or (loss) recognized in AOCI	(199)	1,000	$ (107)
Sales | Interest Rate Swap | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Sales | Cross currency interest rate swaps contracts: | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Sales | Cross currency interest rate swaps contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Sales | Forward foreign exchange contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	17	12
Amount of gain or (loss) recognized in AOCI	(94)	44
Cost of Products Sold | Interest Rate Swap | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Cost of Products Sold | Cross currency interest rate swaps contracts: | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Cost of Products Sold | Cross currency interest rate swaps contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Cost of Products Sold | Forward foreign exchange contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	119	(329)
Amount of gain or (loss) recognized in AOCI	(557)	298
R&D Expense | Interest Rate Swap | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
R&D Expense | Cross currency interest rate swaps contracts: | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
R&D Expense | Cross currency interest rate swaps contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	0	0
Amount of gain or (loss) recognized in AOCI	0	0
R&D Expense | Forward foreign exchange contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	30	(137)
Amount of gain or (loss) recognized in AOCI	123	(91)
Interest (Income) Expense | Interest Rate Swap | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	(109)	0
Amount of gain or (loss) recognized in AOCI	109	0
Interest (Income) Expense | Cross currency interest rate swaps contracts: | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	174	153
Amount of gain or (loss) recognized in AOCI	174	153
Interest (Income) Expense | Cross currency interest rate swaps contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	402	370
Amount of gain or (loss) recognized in AOCI	9	748
Interest (Income) Expense | Forward foreign exchange contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Other (Income) Expense | Interest Rate Swap | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Other (Income) Expense | Cross currency interest rate swaps contracts: | Fair Value Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in income on derivative amount excluded from effectiveness testing	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Other (Income) Expense | Cross currency interest rate swaps contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	0	0
Amount of gain or (loss) recognized in AOCI	0	0
Other (Income) Expense | Forward foreign exchange contracts: | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from AOCI into income	47	(16)
Amount of gain or (loss) recognized in AOCI	$ 146	$ (52)