Pensions and Other Benefit Plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,421	$ 1,380	$ 1,163
Interest cost	770	955	1,096
Expected return on plan assets	(2,645)	(2,461)	(2,322)
Amortization of prior service cost	(181)	2	4
Recognized actuarial losses (gains)	1,257	891	579
Curtailments and settlements	1	23	73
Net periodic benefit cost	623	790	593
Other Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	309	287	274
Interest cost	81	133	185
Expected return on plan assets	(7)	(7)	(6)
Amortization of prior service cost	(31)	(31)	(31)
Recognized actuarial losses (gains)	151	142	129
Curtailments and settlements	0	0	0
Net periodic benefit cost	$ 503	$ 524	$ 551