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Pensions and Other Benefit Plans - Schedule of Defined Benefit Plans Disclosures (Details) - Retirement plans - USD ($)
$ in Millions
Jan. 01, 2023
Jan. 02, 2022
Jan. 03, 2021
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 31,514 $ 41,930 $ 38,195
Fair Value, Measurements, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 31,514 41,930  
Investments Measured at Net Asset Value 8,612 10,515  
Fair Value, Measurements, Recurring | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 8,879 14,209  
Fair Value, Measurements, Recurring | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 13,954 17,086  
Fair Value, Measurements, Recurring | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 69 120  
Fair Value, Measurements, Recurring | Short-term investment funds      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 46 1,135  
Fair Value, Measurements, Recurring | Short-term investment funds | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 33 102  
Fair Value, Measurements, Recurring | Short-term investment funds | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 13 1,033  
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 5,863 7,016  
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 5,863 7,016  
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 3,681 3,505  
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 3,681 3,505  
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 8,848 14,109  
Fair Value, Measurements, Recurring | Equity securities | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 8,846 14,107  
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 10,524 14,309  
Investments Measured at Net Asset Value 6,106 8,708  
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 4,362 5,496  
Fair Value, Measurements, Recurring | Commingled funds | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 56 105  
Fair Value, Measurements, Recurring | Other assets      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets 2,552 1,856  
Investments Measured at Net Asset Value 2,506 1,807  
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 33 34  
Fair Value, Measurements, Recurring | Other assets | Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Plan Assets $ 13 $ 15