Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Derivative [Line Items]
Contingent consideration liability	$ 633	$ 1,715
Fair Value, measurement with unobservable inputs reconciliation, recurring basis, liability value	633	1,715	$ 397	$ 600
Other assets, noncurrent	6,562	5,695
Deferred net losses (gains) on derivatives included in accumulated other comprehensive income	$ (652)
Description of reclassification of cash flow hedge gain (loss)	next 12 months
Maximum length of time for hedging transaction exposure	18 months
Contingent consideration reversal	$ (1,148)	0	0
Additions	106	1,246	125
Payments	(99)	(79)	(172)
Foreign exchange contracts
Derivative [Line Items]
Collateral paid	1,100
Derivative, notional amount	37,800	45,300
Cross currency interest rate swaps
Derivative [Line Items]
Derivative, notional amount	30,600	20,100
Equity securities | Equity Investments with Readily Determinable Value
Derivative [Line Items]
Marketable securities, noncurrent	1,481	1,148	511
Other assets, noncurrent	1,481	1,148
Equity, fair value adjustment	527	533
Equity investments, increase (decrease) from acquisition (sale) during period	(194)	104
Equity securities | Equity Investments without Readily Determinable Value
Derivative [Line Items]
Equity, fair value adjustment, impairment loss	(76)	(57)
Other assets, noncurrent	738	712
Equity, fair value adjustment	(55)	(38)
Equity investments, increase (decrease) from acquisition (sale) during period	81	69
Equity, fair value adjustment, change in observable prices	21	19
Equity securities without readily determinable fair value, amount	738	712	681
Fair Value, Inputs, Level 3
Derivative [Line Items]
Contingent consideration liability	633	1,715
Other Current Liabilities
Derivative [Line Items]
Contingent consideration liability	39	84
Other Noncurrent Liabilities
Derivative [Line Items]
Contingent consideration liability	$ 594	$ 1,631	$ 397