Pensions and Other Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - Retirement plans - USD ($) $ in Millions	Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 41,930	$ 38,195	$ 32,201
Fair Value, Measurements, Recurring
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	41,930	38,195
Investments Measured at Net Asset Value	10,515	9,092
Fair Value, Measurements, Recurring | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	14,209	14,502
Fair Value, Measurements, Recurring | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	17,086	14,420
Fair Value, Measurements, Recurring | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	120	181
Fair Value, Measurements, Recurring | Short-term investment funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	1,135	890
Fair Value, Measurements, Recurring | Short-term investment funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	102	127
Fair Value, Measurements, Recurring | Short-term investment funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	1,033	763
Fair Value, Measurements, Recurring | Short-term investment funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Government and agency securities
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	7,016	5,023
Fair Value, Measurements, Recurring | Government and agency securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Government and agency securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	7,016	5,023
Fair Value, Measurements, Recurring | Government and agency securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Debt instruments
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	3,505	3,931
Fair Value, Measurements, Recurring | Debt instruments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Debt instruments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	3,505	3,931
Fair Value, Measurements, Recurring | Debt instruments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	14,109	14,377
Fair Value, Measurements, Recurring | Equity securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	14,107	14,375
Fair Value, Measurements, Recurring | Equity securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	2	2
Fair Value, Measurements, Recurring | Equity securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	14,309	13,086
Investments Measured at Net Asset Value	8,708	8,236
Fair Value, Measurements, Recurring | Commingled funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Commingled funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	5,496	4,690
Fair Value, Measurements, Recurring | Commingled funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	105	160
Fair Value, Measurements, Recurring | Other assets
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	1,856	888
Investments Measured at Net Asset Value	1,807	856
Fair Value, Measurements, Recurring | Other assets | Level 1
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	0	0
Fair Value, Measurements, Recurring | Other assets | Level 2
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	34	11
Fair Value, Measurements, Recurring | Other assets | Level 3
Defined Benefit Plan Disclosure [Line Items]
Plan Assets	$ 15	$ 21