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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 |

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