Fair Value Measurements - Financial Assets and Liabilities at Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019	Apr. 01, 2019
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	$ 1,336
Derivatives designated as hedging instruments : Liabilities	1,860
Equity Investments	1,884	$ 1,481
Debt securities	19,727	14,042
Contingent consideration liability	533	633
Total Gross Assets	1,360	1,138
Credit Support Agreement (CSA)	(1,285)	(1,107)
Total Net Asset	75	31
Total Gross Liabilities	1,888	2,309
Credit Support Agreement (CSA)	(1,855)	(2,172)
Total Net Liabilities	33	137
Beginning Balance	633	1,715	$ 397
Changes in estimated fair value	(52)	(1,089)	151
Additions	0	106	1,246
Payments	(48)	(99)	(79)
Ending Balance	533	633	1,715
Contingent consideration reversal	0	(1,148)	0
Other Noncurrent Liabilities
Financial assets and liabilities at fair value
Contingent consideration liability	520	594	1,631
Other Current Liabilities
Financial assets and liabilities at fair value
Contingent consideration liability	13	39	$ 84
Auris Health
Financial assets and liabilities at fair value
Contingent consideration liability		1,100		$ 2,350
Contingent consideration reversal	(1,148)
Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Equity Investments	1,884	1,481
Debt securities	0
Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	1,336	1,089
Derivatives designated as hedging instruments : Liabilities	1,860	2,271
Equity Investments	0
Debt securities	19,727
Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Equity Investments	0
Debt securities	0
Contingent consideration liability	533	633
Interest rate swaps contracts:
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	796
Derivatives designated as hedging instruments : Liabilities	979
Interest rate swaps contracts: | Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Interest rate swaps contracts: | Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	796	240
Derivatives designated as hedging instruments : Liabilities	979	1,569
Interest rate swaps contracts: | Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Foreign exchange contracts
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	540
Derivatives designated as hedging instruments : Liabilities	881
Derivatives not designated as hedging instruments : Assets	24
Derivatives not designated as hedging instruments : Liabilities	28
Foreign exchange contracts | Level 1
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Derivatives not designated as hedging instruments : Assets	0
Derivatives not designated as hedging instruments : Liabilities	0
Foreign exchange contracts | Level 2
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	540	849
Derivatives designated as hedging instruments : Liabilities	881	702
Derivatives not designated as hedging instruments : Assets	24	49
Derivatives not designated as hedging instruments : Liabilities	28	$ 38
Foreign exchange contracts | Level 3
Financial assets and liabilities at fair value
Derivatives designated as hedging instruments : Assets	0
Derivatives designated as hedging instruments : Liabilities	0
Derivatives not designated as hedging instruments : Assets	0
Derivatives not designated as hedging instruments : Liabilities	$ 0